A:a group of people lived
B:a group of people did live
C:did a group of people live
D:lived a group of people
一个因数是6,另一个因数是5,积是____
基因型为AaBb的个体(两对基因独立遗传),产生基因型为aB卵细胞的同时,3个极体的基因型是( )