题干

下列系谱图中,6号无患病基因,7号和8号婚后生一个同时患两种病男孩的概率是
(  )

A:1/48

B:1/24

C:1/16

D:无法确定

上一题 下一题 0.0难度 选择题 更新时间:2012-07-03 09:00:26

答案(点此获取答案解析)

A

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阅读下面这首古诗,完成两小题。
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