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

在合子机制中，匹配可以，但或不产生杂种或杂种不。

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.

完全在同一种群内杂交的个体比以两个方杂交的个体繁殖代要多，因此为了产生无生机的杂种，就要消耗掉一些配子。