爬行动物身上同样存在基板，但在胚胎阶段时，它们只会触发基板后延的皮肤细胞基因进行增殖，并最终形成鳞片。

Reptiles have placodes too. But in a reptile embryo each placode switches on genes that cause only the skin cells on the back edge of the placode to grow, eventually forming scales.

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例如，后代身上出现的一种称为过氧化物酶体增殖物激活型受体 (Ppara)的基因对调节胆固醇和脂类在肝脏中进行转换起着至关重要的作用。

One gene that changed in offspring, for example — known as Ppara — is essential in cholesterol management and the liver's role in converting lipids.

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但很多人也对基因合成的增殖有所担心。

But there are those that worry about the proliferation of gene synthesis.

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