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Topic: Autosome


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In the News (Thu 26 Nov 09)

  
  Autosome
An autosome is an ordinary paired chromosome that is the same in both sexes of a species.
The X and Y chromosomes are not autosomal.
Non-autosomal chromosomes are usually referred to as sex chromosomes or, less frequently, as gonosomes.
www.ebroadcast.com.au /lookup/encyclopedia/au/Autosome.html   (49 words)

  
 Autosome definition - Medical Dictionary definitions of popular medical terms
Autosome: A chromosome that is not a sex chromosome.
People normally have 22 pairs of autosomes in every cell (together with two sex chromosomes -- an X and a Y in the male and two Xs in the female -- for a total of 46 chromosomes).
The term "autosome" was coined by Montgomery in 1906.
www.medterms.com /script/main/art.asp?articlekey=2406   (124 words)

  
 Medical Dictionary: Autosome - WrongDiagnosis.com - WrongDiagnosis.com
Autosome: One of the chromosomes 1..22; not including the sex chromosomes.
Autosome : any ordinary chromosome alike in males and females, as distinguished from sex chromosomes; in humans there are normally 22 pairs of autosomes.
Many chromosome disorders and genetic disorders (autosomal recessive or autosomal dominant) affect the autosomes.
www.wrongdiagnosis.com /medical/autosome_printer.htm   (133 words)

  
 Autosome - Wikipedia, the free encyclopedia
Non-autosomal chromosomes are usually referred to as sex chromosomes, allosomes or heterosomes.
An autosomal dominant gene is one on an autosome that is always expressed, even if a single copy exists.
The chance is 1 in 2 (50%) for passing this autosomal dominant gene to a particular offspring.
en.wikipedia.org /wiki/Autosome   (126 words)

  
 Genitics1
autosome gene is defined as a gene found on any autosome chromosome and a sex-linked gene is found on the sex or gender chromosomes.
Autosome chromosomes always come in pairs so there is no such distinction between a cock and a hen in respect to autosome genes.
Autosome pairs operate is much the same fashion as a cocks Z chromosome pair.
www.angelfire.com /ga/huntleyloft/Genetics_Chapter_3.html   (2203 words)

  
 My Opals
Opals, both Dominant Opal and Recessive Opal are Autosome genes which means they are found on a chromosome other than the sex (Z) chromosome.
The tail is one of the keys to identification and distinguishes it from its sometime look-alikes, Reduced and Dominant Opal.
Autosome means it is found on a chromosome other than the sex (Z) chromosome.
www.angelfire.com /ga/huntleyloft/recopal.html   (1552 words)

  
 projects   (Site not responding. Last check: 2007-11-05)
Both genes are autosomal and the mutations are recessive and viable.
Such gametes are found for him-5 at a rate of 10-3 per autosome (or several hundred-fold lower than the rate of X chromosome loss), indicating that him-5 affects the X more strongly than the autosomes but does affect the autosomes.
There is also 100% interference on the autosome that we tested (and on another autosome for which we have less data that has been tested since the paper was written.) Thus, there is probably one crossover per chromosome during oogenesis, for a total of six crossovers in the genome.
www.haverford.edu /biology/Meneely/projects.htm   (907 words)

  
 BioMed Central | Full text | Abnormal X : autosome ratio, but normal X chromosome inactivation in human triploid ...
This phenomenon is commonly thought to suggest 1) that normal development requires a ratio of one Xa per diploid autosomal set, and 2) that an early event in XCI is the marking of one X to be active, with remaining X's becoming inactivated by default.
In triploids, which occur in approximately 1% of human conceptions [4], this ratio of one active X (Xa) per diploid autosomal set cannot be achieved.
A later variant of this "counting to one" model proposed that the active-X marking factor would be autosomally derived and, therefore, dependent on ploidy [18-20].
www.biomedcentral.com /1471-2156/7/41   (4713 words)

  
 Autosome - definition from Biology-Online.org
The diploid human genome consists of 46 chromosomes, 22 pairs of autosomes, and 1 pair of sex chromosomes (the X and Y chromosomes).
Any chromosome that is not a sex chromosome; appear in pairs in body cells but as single chromosomes in spermatozoa.Autosomes are all the chromosomes found in an organism barring its sex chromosomes.
These autosomes carry a bulk of the genetic information required to create a fully functioning organism.
www.biology-online.org /dictionary/Autosome   (160 words)

  
 BioInteractive's Animation Console
The other chromosome pairs, called the autosomes, appear to be identical twins; they are superficially indistinguishable.
The sex chromosomes began as an ordinary pair of autosomes.
About 130 million years ago (Ma), an autosome donated a block of genes that extended the length of both the X and the Y chromosome.
www.hhmi.org /biointeractive/animations/y_evol/y_print.htm   (1732 words)

  
 Autosome | | Dictionary & Translation by Babylon
Autosome in 13 languages, encyclopedia term for Autosome.
Als autosomal - entweder autosomal dominant oder autosomal rezessiv - werden dementsprechend Vererbungen oder Erbgänge bezeichnet, bei denen das betroffene Gen oder die Genregion auf einem Autosom liegt.
Chez l'homme, dans les cellules somatiques, il y a 22 paires de chromosomes homologues (dits chromosomes autosomes), numérotés de 1 à 22 et une paire de chromosomes sexuels (appelés hétérochromosomes ou gonosomes : XY chez l'homme, XX chez la femme).
www.babylon.com /definition/Autosome/All   (400 words)

  
 The Foundation Fighting Blindness - Kids Corner   (Site not responding. Last check: 2007-11-05)
Approximately 20 percent of all families with RP have an autosomal dominant inheritance pattern.
Autosomal recessive and autosomal dominant diseases are caused by mutations in genes that reside on one of the 22 paired autosomes.
Humans have 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes).
www.blindness.org /kidscorner/glossary.htm   (1275 words)

  
 Filaria Journal | Full text | The chromosomes of the Filariae
In other organisms with X0 sex chromosomes, such as Orthoptera, the fusion of an autosome to the X chromosome to create a neo-XY is very well documented [17].
Genetically, an X0 sex determining system has to be a 'balance' system, and there is a good understanding of the molecular basis of sex determination in Caenorhabditis (which has an X0 system, with X0 males and XX hermaphrodites) [18], and it is probable that filariae are basically similar.
Silver staining is a technique that stains the nucleolus and hence reveals the active nucleolus organising regions, which is where the active ribosomal genes (rDNA) are found [32].
www.filariajournal.com /content/4/1/10   (3305 words)

  
 U. Chicago study overturns conclusion of historic human genome data
The study, published in the Jan. 23, 2004, issue of Science, shows that an excess of genes on the X chromosome "jump" to a non-sex chromosome, or autosome, during germline cell division.
The researchers compared the rate of gene traffic on the X to all of the autosomes and found the X chromosome exports four times as many genes than the average autosome and imports 3.5 times as many.
They found that 77 percent of the genes leaving the X chromosome have testis expression, compared to 44 percent of genes that jump from autosome to autosome.
www.eurekalert.org /pub_releases/2004-01/uocm-ucs012004.php   (920 words)

  
 Gene ‘traffic’ study overturns claims of earlier research
Besides studying the human genome, the researchers also charted the gene traffic of the X chromosome and its 19 autosomes for mice and found the same basic pattern.
The researchers compared the rate of gene traffic on the X to all of the autosomes and found that the X chromosome exports four times as many genes as the average autosome and imports 3.5 times as many.
Since both mice and humans share the same excess-traffic characteristics on the X chromosome, this Darwinian process has evolved slowly and therefore was present prior to the mouse-human split, the researchers noted.
chronicle.uchicago.edu /040415/genetraffic.shtml   (820 words)

  
 Painting of fourth in genus Drosophila suggests autosome-specific gene regulation -- Larsson et al. 101 (26): 9728 -- ...   (Site not responding. Last check: 2007-11-05)
Karyotypes are indicated, F element fused to X (F+X), F element as a unique dot chromosome (F, X), and F element fused to an autosome (F+A).
to the autosomes, haplo-4 and triplo-4 flies are viable and
to one of the autosomes, element E corresponding to 3R in D.
www.pnas.org /cgi/content/full/101/26/9728   (4165 words)

  
 A Pseudohitchhiking Model of X vs. Autosomal Diversity -- Betancourt et al. 168 (4): 2261 -- Genetics
The ratio of X-linked to autosomal heterozygosities is therefore
(ii) the ratio of r/s is the same on the X and autosomes.
The recombination rate (in females) between the selected and neutral locus is r = 0.001 and the homozygous selection coefficient is either (A) s = 0.2 or (B) s = 0.02.
www.genetics.org /cgi/content/full/168/4/2261   (3918 words)

  
 Inheritance and linkage of isozymes in Yponomeuta padellus (Lepidoptera, Yponomeutidae)   (Site not responding. Last check: 2007-11-05)
Autosomal linkage analysis was facilitated by the lack of crossing-over in females characteristic of Lepidoptera, because linkage in female-informative crosses is all-or-none and observation of 'forbidden recombinants' provides conclusive evidence that two loci are not syntenic.
Convincing evidence was found for linkage of the autosomal loci me and mpi.
Previous cytological studies have shown that the sex chromosomes in heterogametic females are associated in a trivalent, consisting of a W chromosome translocated to an autosome (A
www.nature.com /hdy/journal/v78/n6/abs/6881580a.html   (319 words)

  
 Genic Mutation Rates in Mammals: Local Similarity, Chromosomal Heterogeneity, and X-Versus-Autosome Disparity -- Malcom ...
the X chromosome is not distinct from autosomes.
In all, we examined 1,731 autosomal genes and 70 X-linked genes
The autosomal average is shown as a dashed line, and the number of genes compared for each chromosome is given in parentheses
mbe.oxfordjournals.org /cgi/content/full/20/10/1633   (4442 words)

  
 Genetic Health Glossary   (Site not responding. Last check: 2007-11-05)
Autosomes contain many thousands of genes, but do not contain genes that determine the sex of an organism.
Sex chromosomes, on the other hand, do contain sex-determining genes.
Humans have a total of 46 chromosomes; 44 autosomes and two sex chromosomes.
www.genetichealth.com /glossary/autosome.html   (76 words)

  
 XX male syndrome definition - Medical Dictionary definitions of popular medical terms
This is often due to an abnormal interchange between the Y chromosome and the X chromosome, resulting in presence of the SRY gene on the X chromosome and infertility.
It may also be due to translocation of SRY to an autosome (a non-sex chromosome).
The X/autosome translocation can occur de novo (be new) or be inherited from a parent.
www.medterms.com /script/main/art.asp?articlekey=25059   (280 words)

  
 JRM Mar2000: Ovarian Stimulation in a Woman with Premature Ovarian Failure and X-Autosome . . .   (Site not responding. Last check: 2007-11-05)
The couple refused a second stimulation, and menstruation occurred 32 days after the first.
Conclusion: At least some hope can be offered to infertile women with hyper- gonadotropinism and X- autosomal translocation, although it is impossible to determine whether ovulation induction will result in pregnancy.
New treatments can be anticipated for women with POF and X chromosome aberrations who have similar hormonal environments.
www.jreprodmed.com /abs/JRM844.htm   (250 words)

  
 Rescue from the effects of trisomy 13q32right-arrowqter owing to skewed X inactivation in a der(X)t(X;13)(p21;q32) ...
spreading the inactivation to the small autosomal segment and
of the spreading of inactivation into the autosomal segment.
Schanz S, Steinbach P. Investigation of the "variable spreading" of X inactivation into a translocated autosome.
jmg.bmjjournals.com /cgi/content/full/36/9/718   (1452 words)

  
 Autosome - Glossary Entry - Genetics Home Reference
Autosome - Glossary Entry - Genetics Home Reference
The diploid human genome consists of a total of 46 chromosomes: 22 pairs of autosomes, and 1 pair of sex chromosomes (the X and Y chromosomes).
How do geneticists indicate the location of a gene?
ghr.nlm.nih.gov /ghr/glossary/autosome   (62 words)

  
 Chromosome X; autosome translocation syndrome information Diseases Database   (Site not responding. Last check: 2007-11-05)
Chromosome X; autosome translocation syndrome: Definition(s) via UMLS.....
Chromosome X; autosome translocation syndrome to medical search resources.
Content is not asserted complete or error free, please see also our disclaimer.
www.diseasesdatabase.com /ddb32359.htm   (194 words)

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