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.
完全在同一种群内进
杂交的
比以两
方向进
杂交的
繁殖

多,因此为了产生无生机的杂种,就
消耗掉一些配子。
裔,


;


