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【单选题】
在一个遗传平衡群体中,已知甲型血友病的男性发病率为 0.00008 ,选择系数 0.9 ,致病基因突变率为A.
18 × 10 － 6 / 代
B.
24 × 10 － 6 / 代
C.
36 × 10 － 6 / 代
D.
72 × 10 － 6 / 代
E.
48 × 10 － 6 / 代
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