In postzygotic isolating mechanisms mating occur, but the resulting hybrid organism is inviable or sterile.

合子后隔离机制中，匹配可以进行，但不产生不。

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.

完一群内进行交的个体比以两个方向进行交的个体繁殖后代要多，因此为了产生无生机的，就要消耗掉一些配子。