試題詳解

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