母蜂

mǔ fēng néng gēn jù jì zhǔ dà xiǎo zhǔ dòng kòng zhì chǎn luǎn de xìng bié

母蜂能根据寄主大小主动控制产卵的性别。

The female wasps had an ability to control the sex ratio of their progeny based on size of the host larvae.