An allele which can only express itself in a homozygous condition .

只可在纯合的状态下表现所控制的性状的等位基因。

Homozygous races do not segregate on selfing .

自体受精不能分离纯合的生理小种。

Altogether half the offspring will be homozygous at that particular locus .

加在一起，将有半数的后代在那个特定的位点上是纯合的。

Homozygous tetraploid is a relatively balanced system , the continued selection is invalid .

纯合的四倍体是一个相对平衡的系统，继续选择是无效的。

This requires both parents to be homozygous for same alleles in question .

对于相同的等位基因来说，父母本的等位基因都要是纯合的。