单选题具有DdTt基因型（这些基因是独立分配的）的个体进行自交，产生的子代中，ddTT和ddTt将分别占整个基因型的比例是（）。A1/8和1/16B1/16和1/8C1/16和1/4D1/8和1/8
单选题
具有DdTt基因型（这些基因是独立分配的）的个体进行自交，产生的子代中，ddTT和ddTt将分别占整个基因型的比例是（）。
A
1/8和1/16
B
1/16和1/8
C
1/16和1/4
D
1/8和1/8
参考解析
解析：
具有DdTt基因型（这些基因是独立分配的）的个体进行自交，后代dd所占比例为1/4，TT所占比例为1/4，则ddTT所占比例为1/4×1/4=1/16，同理ddTt所占比例为1/4×1/2=1/8，故B 正确。
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