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.

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

Uses

An autosomal dominant gene is one on an autosome that is always expressed, even if a single copy exists. The chance is 1 in 2 (50%) for passing this autosomal dominant gene to a particular offspring. There are 23 pairs of chromosomes in humans.

See also

---

• Autosomal dominant

Chromosomes

Autosom | Autosoom | Autosómico | Chromosome homologue | אוטוזומי | Autoszóma | Autosoom | Autosom | Autossomo | Аутосома | Аутозом | Autosom