A:(﹣2,3),4
B:(﹣2,3),16
C:(2,﹣3),4
D:(4,﹣6),16
Many people have got the habit of buying flowers for their mothers on _______.
在一个种群中随机抽出一定数量的个体,其中基因型为AA的个体占24%,基因型为Aa的个体占72%,基因型为aa的个体占4%,则基因A和a的频率分别是( )