灵长类

14 per cent of primate species are highly endangered.

14% 的灵长类物种处于高度濒危状态。

But many primates, including humans, hae a third photopigment, encoded by a second gene on the X chromosome.

但是多数灵长类包括人类有着三种感光色素，通过在X染色体的第二种基因编码。