Autosome

Definition

noun, plural: autosomes

(Science: Genetics)

Any chromosome not considered as a sex chromosome, or is not involved in sex determination. It occurs in pairs in somatic cells and singly in sex cells (gametes).


Supplement

For instance, a human somatic cell will normally contain 23 pairs of chromosomes (total=46 chromosomes). Twenty-two (22) of these pairs will be autosomes, and only one of them will be a pair of sex chromosomes (the X and Y chromosomes).

In sex cells like egg cell and sperm cell where chromosomes occur singly (total=23), 22 of them are autosomes while the remaining one is a sex chromosome (either X or Y chromosome).


Word origin: Gk, comb. form of autós ,self + Gk soma, body.

Related forms: autosomal (adjective).

Synonym: euchromosome.
Compare: sex chromosome.
See also: chromosomes.


Please contribute to this project, if you have more information about this term feel free to edit this page



This page was last modified on 13 July 2008, at 01:32. This page has been accessed 327,884 times. 
What links here | Related changes | Permanent link