AskDefine | Define autosome

Dictionary Definition

autosome n : any chromosome that is not a sex chromosome; appear in pairs in body cells but as single chromosomes in spermatozoa [syn: somatic chromosome]

User Contributed Dictionary



  1. any chromosome other than sex chromosomes

Extensive Definition

An autosome is a non-sex chromosome. It is an ordinarily paired 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.
Like other chromosomes, autosomes display STR and SNP mutations which can be observed and have been used in genetic testings for ancestry, ethnicity, race and genealogical purposes. Private testing companies which do autosomal STR tests include FamilyTreeDNA and DNAtribes. Whereas companies testing autosomal SNPs include AncestryByDNA and deCODEme.


External links

autosome in Danish: Autosom
autosome in German: Autosom
autosome in Estonian: Autosoom
autosome in Spanish: Autosoma
autosome in Hebrew: אוטוזומי
autosome in Italian: Autosoma
autosome in Lithuanian: Autosoma
autosome in Hungarian: Autoszóma
autosome in Dutch: Autosoom
autosome in Japanese: 常染色体
autosome in Norwegian: Autosom
autosome in Polish: Autosom
autosome in Portuguese: Autossomo
autosome in Russian: Аутосома
autosome in Slovenian: Avtosom
autosome in Serbian: Аутозом
autosome in Swedish: Autosomal
autosome in Finnish: Autosomi
autosome in Turkish: Otozomlar
autosome in Chinese: 常染色体
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