Blue eyes are recessive and brown eyes are dominant.

蓝眼睛是隐性；而褐色眼睛是显性。

The kind of mating, using as one parent a known homozygous recessive, is called a testcross.

这种杂交即利用一个纯合隐性作为一个亲本杂交，称为测交。

For crop improvement，haploidy enables the achievement of rapid homozygosity, enhanced selection efficiency for recessive genes, and breeding at a diallelic state for autopolyploid species.

作物改良，单倍体可以快速得到纯合体、提高隐性基因选择效果等位基因条件下培育同源多倍体品种。