問題詳情
69. Assuming complete dominance, crosses between two dihybrid F1 plants, which are offspring from a cross AABB x aabb,result in F2 phenotype ratios of _____.
(A) 1:2:1
(B) 3:1
(C) 1:1:1:1
(D) 9:3:3:1
(E) 9:1
參考答案
答案：D
難度：適中0.666667
統計：A(1),B(1),C(1),D(10),E(0)