Autosome

An autosome is a non-sex chromosome. It is an ordinary paired 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.

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Non-autosomal chromosomes are usually referred to as sex chromosomes or, less frequently, as gonosomes.

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An autosomal dominant gene is one on an autosome and is always expressed, even if a single copy exists. The chance is 1:2 for passing this gene to offspring. There are 23 pairs of chromosome in humans.

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Chromosome: :For information about chromosomes in genetic algorithms, see Chromosome (genetic algorithm)....

Sex: :This article is about sex, meaning the different biological sexes—male, female, etc. For alternate uses, see Sex (disambiguation)...

Species: In biology, the most commonly used definition of species was first coined by Ernst Mayr. Species are "groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups" (however, see other definitions of species below)....