Insects propagate themselves by means of eggs.

昆虫产卵繁殖后代。

Individuals crossing exclusively within the same population produce more progeny than those crossing in both directions and thereby use up some of their gametes for the production of inviable hybrids.

完全在同一进行杂交的个体比两个方向进行杂交的个体繁殖后代多，因此为了产生无生机的杂，就消耗掉一些配子。