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29.蜗牛的有条纹A对无条纹(a)为显性。在一个地区的蜗牛种群内,有条纹AA个体占55%,无条纹个体占15%,若蜗牛间进行自由交配得到Fl,则A基因的频率和F1中Aa基因型的频率分别是 (A)30%,
問題詳情
29.蜗牛的有条纹A对无条纹(a)为显性。在一个地区的蜗牛种群内,有条纹AA个体占55%,无条纹个体占15%,若蜗牛间进行自由交配得到Fl,则A基因的频率和F1中Aa基因型的频率分别是
(A)30%,2l%
(B)30%,42%
(C)70%,2l%
(D)70%,42%
參考答案
答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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