.^ The handout also includes the number of chromosomes for each species.- NOVA Online | Teachers | Classroom Activity | Judgment Day: Intelligent Design on Trial | PBS 20 September 2009 15:32 UTC www.pbs.org [Source type: FILTERED WITH BAYES]
^ Normal members of a particular eukaryotic species all have the same number of nuclear chromosomes (see the table).
^ Shall define a convention for the order of different Chromosomes located on the same Individual and appends all such Chromosomes to the Inividual.
.^ The number of chromosomes in the egg or sperm is different from that in other body cells.- Unique - The Rare Chromosome Disorder Support Group - www.RareChromo.org 11 September 2009 23:27 UTC www.rarechromo.org [Source type: FILTERED WITH BAYES]
^ Subsequent generations would have even more chromosomes per cell.- Inside the Cell: Chapter 4: Cellular Reproduction: Multiplication by Division - National Institute of General Medical Sciences 19 January 2010 9:53 UTC publications.nigms.nih.gov [Source type: FILTERED WITH BAYES]
^ Other chromosome numbers .- 7 Genetic Research and Chromosome Number 19 January 2010 9:53 UTC www.nal.usda.gov [Source type: FILTERED WITH BAYES]
The 23 human chromosome territories during prometaphase in fibroblast cells.
.^ All I am saying is that when one looks at the “evidence” for common ancestry it is very apparent that the same “evidence” can be used to support common design and/ or convergence.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ My point is that ID and evolution were looking at the same set of data at any one point, and evolution could have retroactively predicted any number of things, because that’s what’s happened in evolution.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ Allozyme, alloenzyme One of the different forms of an enzyme found in individuals of the same species, due to the presence of multiple alleles in the population.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
However, asexual species can be either haploid or diploid.
.^ Haploid cells have one complete set of chromosomes.
^ Replication: Cells reproduce by splitting in two.- Chromosomes and Genes: Genetics: Merck Manual Home Edition 19 January 2010 9:53 UTC www.merck.com [Source type: Academic]
^ Are the two sets of daughter chromosomes identical to those in the parent cell?
.^ Gamete Mature reproductive cell with a haploid set of chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ After all, if they could have come up with any old thing, evidence bedamned, why did they settle on the one possibility that is consistent with known chromosome behavior?- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ They knew to look for a fused chromosome because, according to the hypothesis of common descent, we were short one.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
.^ Germ cell Any cell of the germ line.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Germ line A cell line that gives rise to gametes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Germ line mutation A heritable genetic change in the germ line cells.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
.^ Pairing of X and Y chromosomes during meiosis .- Chapter03x 11 September 2009 23:27 UTC www.cns.pdx.edu [Source type: Academic]
^ During meiosis, the matching chromosomes of father and mother can exchange small parts of themselves ( crossover ), and thus create new chromosomes that are not inherited solely from either parent.- Chromosomes - Wikiversity 19 January 2010 9:53 UTC en.wikiversity.org [Source type: Academic]
- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ There are 23 chromosomes from the mother and a "Y" chromosome from a father.- Chromosomes, Somatids, and the Blood of Christ | Ark of Covenant 19 January 2010 9:53 UTC anchorstone.com [Source type: Original source]
When a male and a female gamete merge ( fertilization), a new diploid organism is formed.
.^ However, we cannot firmly exclude at present the possibility that some homologous chromosome pairs occupy nonrandom “orbital” positions with regard to each other.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Monosome A chromosome in a diploid set with no homolog.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ For example, the cells of some salamanders may contain 40 times more DNA than those of humans.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
Plants important in agriculture such as tobacco or wheat are often polyploid, compared to their ancestral species. .^ Haploid Genetic material consisting of a single chromosome set (half of the diploid number).- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
.^ We also compared the radial voxel distributions of the CTs of HSAs 1 and 20 as an example of a large and a small chromosome having similar average gene densities ( Figure 6 C and 6 F).- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ D projections of the IGCs determined for all chromosome types (1–22, X, and Y) present in 28 prometaphase rosettes of male diploid human fibroblasts (compare to Figure S2 ).- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
[37]
Prokaryotes
.^ Do most of our cells have one or two copies of each chromosome?- Inside the Cell: Chapter 4: Cellular Reproduction: Multiplication by Division - National Institute of General Medical Sciences 19 January 2010 9:53 UTC publications.nigms.nih.gov [Source type: FILTERED WITH BAYES]
^ Prokaryote species generally have one copy of each major chromosome, but most cells can easily survive with multiple copies.- Chromosomes - Wikiversity 19 January 2010 9:53 UTC en.wikiversity.org [Source type: Academic]
- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
- Chromosome - Trust 19 January 2010 9:53 UTC enwiki-trust.cse.ucsc.edu [Source type: Academic]
^ For example, Buchnera , a symbiont of aphids has multiple copies of its chromosome, ranging from 10–400 copies per cell.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
[38] .^ Y Chromosome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Degrading Down Syndrome Information: Frequently Asked Questions (FAQ) Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Myelin Down Syndrome Information: Diagnosis of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
[39] .^ However, we cannot firmly exclude at present the possibility that some homologous chromosome pairs occupy nonrandom “orbital” positions with regard to each other.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Bacterial artificial chromosome (BAC) A vector capable of replication in bacteria that is used to clone 100 to 300 kb DNA fragments into E. coli cells.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
[40] .^ Consistent with this variability 3D CT–CN–CT angles ( Figure S9 ) and 3D PC–CR–PC angles ( Figure S10 ) ranged from very small to large angles near 180°.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ The volume of a given iS was proportional to the DNA content of its natural chromosome counterpart, while its radius was very small compared with the half-axes of the ellipsoid.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ As the result of an extra copy of chromosome 21 that the developing fetus possesses, the child with Down syndrome has physical, medical, and cognitive disorders which vary in severity from case to case.
.^ Immortalization The generation of cells that undergo an infinite number of division cycles.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Syndrome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Chromosome Down Syndrome Down syndrome is a genetic disease caused by three major factors, genetics, chromosome formation and cell division.
Karyotype
Figure 3: Karyogram of a human male
.^ In general, the karyotype is the characteristic chromosome complement of a eukaryote species .- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ A diagram of the chromosome complement of a species, showing banding patterns, that is often used to compare karyotypes of different species.- NOVA Online | Teachers | Classroom Activity | Judgment Day: Intelligent Design on Trial | PBS 20 September 2009 15:32 UTC www.pbs.org [Source type: FILTERED WITH BAYES]
^ The observation of karyotypic uniformity in most species has led to the widespread belief that selection limits chromosomal change.- The Rise of Human Chromosome 2: The Fertility Problem - The Panda's Thumb 20 September 2009 15:32 UTC pandasthumb.org [Source type: FILTERED WITH BAYES]
[41] .^ The preparation and study of karyotypes is part of cytogenetics .- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
.^ Homo sapiens chromosome 22 open reading frame 33 (C22orf33), transcript variant 2 as transfection-ready DNA .- OriGene - Products by Chromosome 19 January 2010 9:53 UTC www.origene.com [Source type: Academic]
^ Homo sapiens peroxisome proliferator-activated receptor alpha (PPARA), transcript variant 5 as transfection-ready DNA .- OriGene - Products by Chromosome 19 January 2010 9:53 UTC www.origene.com [Source type: Academic]
^ Homo sapiens cat eye syndrome chromosome region candidate 6 (CECR6) transcript variant 2 as transfection-ready DNA .- OriGene - Products by Chromosome 19 January 2010 9:53 UTC www.origene.com [Source type: Academic]
.^ Number of chromosomes in various organisms .
^ There may be variation between species in chromosome number and in detailed organization.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ The handout also includes the number of chromosomes for each species.- NOVA Online | Teachers | Classroom Activity | Judgment Day: Intelligent Design on Trial | PBS 20 September 2009 15:32 UTC www.pbs.org [Source type: FILTERED WITH BAYES]
.^ SNPs determine ways that subpopulations within a species differ and provide information about variations of protein expression.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Comparative genomics makes possible the application of information gained from a simple genome to a more complex genome, and is the basis for the understanding of genetic variation within a species.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
Often there is:
- 1. variation between the two sexes
- 2. variation between the germ-line and soma (between gametes and the rest of the body)
- 3. variation between members of a population, due to balanced genetic polymorphism
- 4. geographical variation between races
- 5. mosaics or otherwise abnormal individuals.
Also, variation in karyotype may occur during development from the fertilised egg.
.^ The technique of determining the karyotype is usually called karyotyping .- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
Cells can be locked part-way through division (in metaphase) in vitro (in a reaction vial) with colchicine. .^ Autosome A chromosome not involved in sex determination.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ While the findings described above support the possibility of nonrandom proximity between chromosomes in fibroblast nuclei, the observed cell-to-cell variability emphasizes the probabilistic nature of these patterns.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ The human genome consists of 22 pairs of autosomes, and one pair of sex chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
3.
.^ Chromosome 21 is the smallest human autosome.- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
^ Autosome A chromosome not involved in sex determination.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ The human genome consists of 22 pairs of autosomes, and one pair of sex chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
.^ These are XX in females and XY in males, and can be seen in the karyotype, Fig.- Chromosomes - Wikiversity 19 January 2010 9:53 UTC en.wikiversity.org [Source type: Academic]
^ These are XX in females and XY in males.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ These are examples of genetic imprinting a phenomenon that occurs during meiosis and which results in the male and female genetic contributions to the zygote not being the same.- CHROMOSOME ABNORMALITIES: AUTOSOMES AND SEX CHROMOSOMES 19 January 2010 9:53 UTC www.carolguze.com [Source type: Academic]
Historical note
Investigation into the human karyotype took many years to settle the most basic question. .^ Chromosomes Biology Concepts: Meiosis Meiosis is the process in which sex cells divide into four daughter cells, each with a haploid chromosomes (half the normal amount).
^ Chromosomes exhibit preferential positioning in nuclei of quiescent human cells.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Non-random radial higher-order chromatin arrangements in nuclei of diploid human cells.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
.^ Autosome A chromosome not involved in sex determination.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Sex determination The genetic specification of the sex of an individual by the genes of the X and Y chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
[42] .^ Briefly, starting configurations representing a statistical chromatid distribution in male diploid human fibroblasts (46, XY) at late anaphase/telophase were established as follows.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
[44]New techniques were needed to definitively solve the problem:
- 1. Using cells in culture
- 2. Pretreating cells in a hypotonic solution, which swells them and spreads the chromosomes
- 3. Arresting mitosis in metaphase by a solution of colchicine
- 4. Squashing the preparation on the slide forcing the chromosomes into a single plane
- 5. Cutting up a photomicrograph and arranging the result into an indisputable karyogram.
.^ Until one centromere becomes inactivated the new chromosome will have two active centromeres (dicentric).- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ Chromosome banding and M-FISH analyses performed after the second passage (1:2 split) showed a normal male karyotype (46, XY).- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ The total volume of the 46 iSs (representing the 46 chromosomes of the diploid human complement) comprised 22% of the total volume of the ellipsoidal model nucleus.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
Considering the techniques of Winiwarter and Painter, their results were quite remarkable. [45][46] .^ That is the original humans had 48 chromosomes.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ All these genetic elements can ONLY be inherited, and we share them with chimps, our closest living relatives.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ DNA lineage belonging to an anatomically modern human, because this lineage is not found in living Australians.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
Chromosomal aberrations
The three major single chromosome mutations; deletion (1), duplication (2) and inversion (3).
The two major two-chromosome mutations; insertion (1) and translocation (2).
In Down syndrome, there are three copies of chromosome 21
.^ Chromosomes exhibit preferential positioning in nuclei of quiescent human cells.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Figure 3 displays the positive correlation obtained in quiescent human fibroblasts for the mean normalized radial CN–CT distances and the DNA content of the chromosomes.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Find this article online Koss LG (1998) Characteristics of chromosomes in polarized normal human bronchial cells provide a blueprint for nuclear organization.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
.^ Chromosome Down Syndrome Down syndrome is a genetic disease caused by three major factors, genetics, chromosome formation and cell division.
^ To some extent the spindle may reinforce a size-correlated radial arrangement of chromosomes (see [ 12 ] and references therein).- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Y Chromosome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
.^ Abnormal numbers of chromosomes or chromosome sets, aneuploidy , may be lethal or give rise to genetic disorders.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ Abnormality of chromosome number or structure.- IUPAC Glossary of Terms Used in Toxicology – Terms Starting with C 19 January 2010 9:53 UTC sis.nlm.nih.gov [Source type: Academic]
^ CHROMOSOME ABNORMALITIES OF NUMBER It is estimated that 10% of sperm and 50% of eggs contain abnormal chromosomes (both numerical and structural).- CHROMOSOME ABNORMALITIES: AUTOSOMES AND SEX CHROMOSOMES 19 January 2010 9:53 UTC www.carolguze.com [Source type: Academic]
.^ Genetic counseling is offered for families that may carry a chromosome rearrangement.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ Therefore, the diagnosis of the present invention may be carried out by any means which is capable of detecting change of chromosome regions, aberration of which is intended to be detected.- METHOD OF CANCER DIAGNOSIS BASED ON THE DETECTION OF CHROMOSOME ABNORMALITY - Patent EP1092783 20 September 2009 15:32 UTC www.freepatentsonline.com [Source type: Academic]
^ Y Chromosome A Look at Genetic Genealogy DNA analysis can help family historians break through brick walls and uncover information on genetic disorders and disease.
.^ Chromosome alterations in breast carcinomas: frequent involvement of DNA losses including chromosomes 4q and 21q.- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
^ Several anonymous loci for monogenic disorders and predispositions for common complex disorders have also been mapped to this chromosome, and loss of heterozygosity has been observed in regions associated with solid tumours.- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
^ Deletion The loss of genetic material from a gene or a chromosome.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
Human examples include:
.^ Presence Klinefelter Syndrome--When Your Baby Boy Has a Chromosome Abnormality This syndrome affects only males and is caused by the wrong number of chromosomes upsetting the natural balance of the body.
^ They knew to look for a fused chromosome because, according to the hypothesis of common descent, we were short one.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ The acrocentric chromosomes (13–15, 21, and 22) carry nucleolar organizer regions (NORs) on their short arms, and active NORs are associated with the nucleoli.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
.^ Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Syndrome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Down syndrome is a chromosomal disorder.
Characteristics include decreased muscle tone, stockier build, asymmetrical skull, slanting eyes and mild to moderate mental retardation.[47]
.^ The most common question I am asked is What is Angelman Syndrome? This article is an attempt to give others a general overview of the disorder.
^ On the other hand, Down syndrome patients have a markedly increased risk of childhood leukaemia 19 , and trisomy of chromosome 21 in blast cells is one of the most common chromosomal aneuploidies seen in childhood leukaemias 40 .- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
^ An extra copy of chromosome 21 causes Down syndrome, the most frequent genetic cause of significant mental retardation, which affects up to 1 in 700 live births.- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
It is a trisomy of chromosome 18. Symptoms include mental and motor retardation and numerous congenital anomalies causing serious health problems. .^ A non-living virus which depends on those human cells to replicate in the first place.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
.^ The malaria parasite, due to its comparatively enormous population size, has in 1 year more mutation/duplication/selection events than all mammal lineages have had in the entire +100 million years they have been in the fossil record.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ After all, if they could have come up with any old thing, evidence bedamned, why did they settle on the one possibility that is consistent with known chromosome behavior?- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ When all chromosomes are capped by teleomeres with a centromere in the middle, and our chromosome #2 is capped by telomeres, followed by two centromeres farther in, and two telomeres in the middle?- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
[48] This is a very rare disorder. Those affected have normal intelligence or mild mental retardation, with poor expressive language skills. .^ Embryo Recognizing Angelman Syndrome: A Rare Disorder My daughter Noel was born with a rare neuro-genetic disorder called Angelman Syndrome.
^ The most common question I am asked is What is Angelman Syndrome? This article is an attempt to give others a general overview of the disorder.
^ Chromosome Rett's Syndrome: A Rare Genetic Mutation that Occurs in Women Rett's Syndrome is a genetic disorder that occurs on the X chromosome that most often occurs in females.
Men with Klinefelter syndrome are usually sterile, and tend to have longer arms and legs and to be taller than their peers. .^ Speech Delays Finding Information Online About Turner's Syndrome Turner's Syndrome is an inherited, chromosome disorder that only affects females.
.^ Y Chromosome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Data from transgenic mice indicate that only a subset of the genes on chromosome 21 may be involved in the phenotypes of Down syndrome 20 .- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
^ Degrading Down Syndrome Information: Frequently Asked Questions (FAQ) Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
.^ Y Chromosome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Degrading Down Syndrome Information: Frequently Asked Questions (FAQ) Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ X Chromosome Down Syndrome Information: Characteristics of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
Features depend on the origin of the extra genetic material. .^ Y Chromosome Down Syndrome Information: Causes of Down Syndrome Down syndrome is a chromosomal disorder in which there is an extra copy of chromosome 21 in the cells of the developing fetus.
^ Chromosome Klinefelter Syndrome--When Your Baby Boy Has a Chromosome Abnormality This syndrome affects only males and is caused by the wrong number of chromosomes upsetting the natural balance of the body.
^ Dogma Edwards Syndrome and Chromosome 18 Edwards' syndrome is a disease that is caused by a gene abnormality, where a person has a third copy of chromosome eighteen.
XXX girls tend to be tall and thin. They have a higher incidence of dyslexia.
Turner syndrome (X instead of XX or XY). .^ Speech Delays Finding Information Online About Turner's Syndrome Turner's Syndrome is an inherited, chromosome disorder that only affects females.
People with Turner syndrome often have a short stature, low hairline, abnormal eye features and bone development and a "caved-in" appearance to the chest.
XYY syndrome. XYY boys are usually taller than their siblings. Like XXY boys and XXX girls, they are somewhat more likely to have learning difficulties.
Wolf-Hirschhorn syndrome, which is caused by partial deletion of the short arm of chromosome 4. It is characterized by severe growth retardation and severe to profound mental health issues.
.^ We have one less chromosome than apes.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ Chromosomal mutations produce changes in whole chromosomes (more than one gene) or in the number of chromosomes present.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ The progeny obtained from the treated plants produced a number of abnormal phenotypes, the same as, or similar to, known mutations.- Fluoride's Mutagenicity (Genotoxicity) 19 January 2010 9:53 UTC www.fluoridealert.org [Source type: Academic]
- Deletion – loss of part of a chromosome
- Duplication – extra copies of a part of a chromosome
- Inversion – reverse the direction of a part of a chromosome
- Translocation – part of a chromosome breaks off and attaches to another chromosome
.^ In sum, the mutations of bacteria and viruses are merely hereditary fluctuations around a median position; a swing to the right, a swing to the left, but no final evolutionary effect.” .- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
Chromosomal aberrations are the changes in the structure of chromosomes. It has a great role in evolution. .^ Two 3D multiplex FISH (M-FISH) protocols were used for the differential coloring of all 24 human chromosome types (22 autosomes plus X and Y).- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
^ Why the diseases that plague you now may not be all your fault after all.
^ Figure 3 displays the positive correlation obtained in quiescent human fibroblasts for the mean normalized radial CN–CT distances and the DNA content of the chromosomes.- PLoS Biology: Three-Dimensional Maps of All Chromosomes in Human Male Fibroblast Nuclei and Prometaphase Rosettes 19 January 2010 9:53 UTC www.plosbiology.org [Source type: Academic]
Human chromosomes
.^ Autosome A chromosome not involved in sex determination.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Chromosomes Biology Concepts: Meiosis Meiosis is the process in which sex cells divide into four daughter cells, each with a haploid chromosomes (half the normal amount).
^ The human genome consists of 22 pairs of autosomes, and one pair of sex chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
.^ Genetic Counseling Cystic Fibrosis and the Genetic Link with Chromosome 7 This article discusses the inheritance of the Cystic Fibrosis gene and the symptoms, treatments and the global statistics of the disease.
^ Y Chromosome A Look at Genetic Genealogy DNA analysis can help family historians break through brick walls and uncover information on genetic disorders and disease.
^ Chromosome Fragile X Synrome Fragile X syndrome is a genetic disorder that is passed from parent to child through the X chromosome.
The autosomes contain the rest of the genetic hereditary information. .^ Gap phase G1 and G2 phases in cell division, during which there is no DNA synthesis.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Mitosis The process of chromosome segregation that occurs during the division of eukaryotic cells.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ S Top S phase The stage of the cell division cycle during which DNA is synthesized.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
.^ The human genome consists of 22 pairs of autosomes, and one pair of sex chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Autosome A chromosome not involved in sex determination.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Chromosomes Biology Concepts: Meiosis Meiosis is the process in which sex cells divide into four daughter cells, each with a haploid chromosomes (half the normal amount).
.^ Several copies of the mitochondrial genome are found in each organelle.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ More Chimp-Human Genome Problems – Cornelius Hunter Excerpt: Even more interesting, at these locations the chimp’s genome is quite similar to other primates–it is the human that differs from the rest, not the chimp.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
.^ Sequencing of the human genome has provided a great deal of information about each of the chromosomes.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ Below is a table compiling statistics for the chromosomes, based on the Sanger Institute 's human genome information in the Vertebrate Genome Annotation (VEGA) database.- Chromosome encyclopedia topics | Reference.com 19 January 2010 9:53 UTC www.reference.com [Source type: Academic]
^ (If found, it would provide support for the hypothesis that two short ancestral chromosomes joined to create human chromosome 2; if not found, it would support the idea that the two ancestral chromosomes did not join, or if they did, that their telomeres may have been lost.- NOVA Online | Teachers | Classroom Activity | Judgment Day: Intelligent Design on Trial | PBS 20 September 2009 15:32 UTC www.pbs.org [Source type: FILTERED WITH BAYES]
.^ The Human Body Straight from the Horse's Mouth: First Draft of Horse Genome Sequenced The first draft of the horse genome sequence has been deposited in public databases and is freely available to researchers.
^ The human genome consists of 22 pairs of autosomes, and one pair of sex chromosomes.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Curators remove redundancy from submitted data, incorporate annotations, and add reference information and links to external databases.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
[50] .^ The criteria governing the gene classification were based on the results of the integrated results of computational analysis using exon prediction programs and sequence similarity searches.- The DNA sequence of human chromosome 21 : Article : Nature 20 September 2009 15:32 UTC www.nature.com [Source type: Academic]
^ Yes, the prediction being based on the fact that we are supposed to be closely related to chimps, and therefore should have the same number of chromosomes.- A Bogey Moment: The Human Chromosome Count | Uncommon Descent 20 September 2009 15:32 UTC www.uncommondescent.com [Source type: FILTERED WITH BAYES]
^ Chromosome walking A strategy for locating a gene based on sequencing a panel of overlapping clones that span the estimated location of a gene.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
.^ The euchromatin corresponds to regions in which the chromosomes are dispersed, and the heterochromatin to the regions in which chromosomes are condensed.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
^ Chromosome walking A strategy for locating a gene based on sequencing a panel of overlapping clones that span the estimated location of a gene.- Drug Discovery & Development - Glossary 19 January 2010 9:53 UTC www.dddmag.com [Source type: Academic]
| Chromosome |
Genes |
Total bases |
Sequenced bases[51] |
| 1 |
4,220 |
247,199,719 |
224,999,719 |
| 2 |
1,491 |
242,751,149 |
237,712,649 |
| 3 |
1,550 |
199,446,827 |
194,704,827 |
| 4 |
446 |
191,263,063 |
187,297,063 |
| 5 |
609 |
180,837,866 |
177,702,766 |
| 6 |
2,281 |
170,896,993 |
167,273,993 |
| 7 |
2,135 |
158,821,424 |
154,952,424 |
| 8 |
1,106 |
146,274,826 |
142,612,826 |
| 9 |
1,920 |
140,442,298 |
120,312,298 |
| 10 |
1,793 |
135,374,737 |
131,624,737 |
| 11 |
379 |
134,452,384 |
131,130,853 |
| 12 |
1,430 |
132,289,534 |
130,303,534 |
| 13 |
924 |
114,127,980 |
95,559,980 |
| 14 |
1,347 |
106,360,585 |
88,290,585 |
| 15 |
921 |
100,338,915 |
81,341,915 |
| 16 |
909 |
88,822,254 |
78,884,754 |
| 17 |
1,672 |
78,654,742 |
77,800,220 |
| 18 |
519 |
76,117,153 |
74,656,155 |
| 19 |
1,555 |
63,806,651 |
55,785,651 |
| 20 |
1,008 |
62,435,965 |
59,505,254 |
| 21 |
578 |
46,944,323 |
34,171,998 |
| 22 |
1,092 |
49,528,953 |
34,893,953 |
| X (sex chromosome) |
1,846 |
154,913,754 |
151,058,754 |
| Y (sex chromosome) |
454 |
57,741,652 |
25,121,652 |
| Total |
32,185 |
3,079,843,747 |
2,857,698,560 |
See also
External links
References
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- ^ European Chromosome 11 Network
- ^ Exploring Genes & Genetic Disorders
- ^ http://vega.sanger.ac.uk/Homo_sapiens/index.html All data in this table was derived from this database, Nov 11, 2008.
- ^ Sequenced percentages are based on fraction of euchromatin portion, as the Human Genome Project goals called for determination of only the euchromatic portion of the genome. Telomeres, centromeres, and other heterochromatic regions have been left undetermined, as have a small number of unclonable gaps. See http://www.ncbi.nlm.nih.gov/genome/seq/ for more information on the Human Genome Project.
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