现有一基因型均为Aa的豌豆种群，若隐性纯合子产生的配子均没有活性，则该种群在自然状态下繁殖n代，子代中能产生可育配子的个体所占比例为
are the girls? They're in the woods. A.Which B.What C.Where
a big tree. A.What B.What a C.How a
The fish are . A.swimming B.swim C.swiming
The elephant is drinking waterit's trunk A.of B.with C.in
The rabbit is eating carrot.It's. A.short B.small C.hungry
粤公网安备 44130202000953号