They have a recessive gene that stops production of melanin .

它们体内的隐性基因不产生黑色素。

However , baldness is another x-linked recessive trait ; you inherit it from your mother .

然而，秃头是另一个和x染色体相关的隐性特征，从母亲那里遗传得来。

Big families in which cousins sometimes marry cousins are ideal for studying recessive genes .

堂兄弟姐妹间相互联姻的大家庭最适合用来做隐性基因的研究。

Anybody with a high school diploma has filled out those dominant / recessive trait punnett squares ......

所有有高中学历的人，应该都填过下面这样的显性/隐性庞氏方格……

The testing is crucial to avoid passing on recessive mutant genes that do not show up in any obvious way in the parent , but can kill or maim or blind its puppy .

这项测试对避免隐性突变基因的遗传（不会在父辈出现明显迹象）至关重要，但也有可能会杀死小狗、使之致残或使其失明。