An autosome is a non-sex chromosome. It is an ordinarily paired [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.] 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.


ee also

*Autosomal dominant
*Autosomal recessive
*Homologous chromosome

External links

* [ Discussion thread on the potential use of autosomal 'Haploblocks' in advanced methods of genetic genealogical testing]
* [ Discussion on "HAPAA" and autosomal 'haploblocks' for greatly improved ancestral admixture testing.]
* [ ENFSI autosomal DNA database allele population frequency calculator]
* [ CSFS autosomal DNA database allele population frequency calculator]
* [ MSNBC article on autosome testing companies including 23andme, deCODEme & Navigenics]

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Look at other dictionaries:

  • autosome — [ otozom ] n. m. • 1936; de auto et (chromo)some ♦ Biol. Tout chromosome non sexuel. Autosomes et hétérochromosomes. ● autosome nom masculin Chromosome dont les informations génétiques n interviennent pas dans la détermination du sexe. autosome n …   Encyclopédie Universelle

  • autosome — autosome. См. эухромосома. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • autosome — coined 1906 by U.S. cytologist T.H. Montgomery (1873 1912), from AUTO (Cf. auto ) + Gk. soma body. Related: Autosomal …   Etymology dictionary

  • autosome — [ôt′ə sōm΄] n. [ AUTO + (CHROMO)SOME] any chromosome that is not a sex chromosome; specif., either of a pair of like chromosomes in a diploid cell autosomal [ôt′əsō′məl] adj …   English World dictionary

  • Autosome — A chromosome that is not a sex chromosome. In other words, any one of the chromosomes save the sex chromosomes. 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 …   Medical dictionary

  • autosome — noun Date: circa 1906 a chromosome other than a sex chromosome • autosomal adjective • autosomally adverb …   New Collegiate Dictionary

  • Autosome — Chromosomes homologues Des chromosomes homologues (une paire de chromosomes homologues forment un bivalent) sont des chromosomes appartenant à la même paire, de même taille possédant les mêmes gènes mais pas obligatoirement les mêmes allèles.… …   Wikipédia en Français

  • autosome — n. [Gr. autos, self; soma, body] Any chromosome other than a sex chromosome; euchromosome; see allosome …   Dictionary of invertebrate zoology

  • autosome — autosomal, adj. autosomally, adv. /aw teuh sohm /, n. Genetics. any chromosome other than a sex chromosome. Also called euchromosome. [1905 10; AUTO 1 + SOME3] * * * …   Universalium

  • autosome — noun /ˈɔːtəsəʊm/ Any chromosome other than sex chromosomes …   Wiktionary

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