Homozygous
This is an old revision of this page, as edited by Rainedaye (talk | contribs) at 02:08, October 26, 2008. It may differ significantly from current revision.
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.