豌豆灰种皮对白种皮是显性,黄子叶对绿子叶为显性.每对性状的杂合

豌豆灰种皮对白种皮是显性,黄子叶对绿子叶为显性.每对性状的杂合子(F1)自交后代(F2)均表现3:1的性状分离比.则下列统计符合上述分离比的是(    )

A.F1植株种皮颜色的分离比     B.F2植株种皮颜色的分离比

C.F1植株子叶颜色的分离比     D.F1和F2种皮颜色的分离比

答案

B


解析:

因为种皮的性状是遗传其母本的,所以,相对而言要慢一代,所以子叶出现性状分离的时候,种皮还没有,只有当子叶的性状分离比为5:3的时候,种皮才出现3:1的比例。

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