allosome

Noun

 * 1)  A sex chromosome that differs from an ordinary autosome in form, size, or behaviour.
 * The human sex chromosomes are a typical pair of allosomes. The X chromosome is present in the ovum, while either X or Y chromosomes can be present in sperm.

Related terms

 * allosomal
 * allosomic

Translations

 * Polish: alosom, allosom
 * Portuguese: alossomo

Etymology
From.