A:32
B:23
C:22
D:2
人的眼睛是( )
We haven't seen her for many days and there is ______ for her safety.
假定五对等位基因自由组合,则杂交组合AaBBCcDDEe×AaBbCCddEe产生的子代中,有一对等位基因杂合、四对等位基因纯合的个体所占的比例是