My watch list  


An autosome is a non-sex chromosome. It is an ordinarily paired[1] type of chromosome that is the same in both sexes of a species. For example, in humans, there are 22 pairs of autosomes. The X and Y chromosomes are not autosomal. Non-autosomal chromosomes are usually referred to as sex chromosomes, allosomes or heterosomes.


  1. ^ In the case of higher ploidy levels than the usual diploid, there will be the same number of an autosome as the ploidy level itself. For example, in a pentaploid, there will be five copies of each autosome.

See also

Classification: Autosome - Sex chromosome

Evolution: Chromosomal inversion - Chromosomal translocation - Polyploidy - Paleopolyploidy

Structure: Chromatin (Euchromatin, Heterochromatin) - Nucleosome - Histone (H1, H2A, H2B, H3, H4) - Centromere - Telomere - Chromatid

  This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Autosome". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE