Homozygous
This is the current revision of Homozygous as edited by Foxtrot (talk | contribs) at 18:43, October 26, 2008. This URL is a permanent link to this version of this page.
A trait that is homozygous is one that is only expressed in an organism when it contains the same copy of two alleles. Recessive genes are expressed in the phenotype of an organism only in individuals that are homozygous for that trait. The opposite of homozygous is heterozygous.