Question

In case of complete dominance dihybrid cross, what should be the phenotypic ratio for the cross Aabb × AaBb?
[0.7 mark]

• A. 3 : 3 : 1 : 1
• B. 5 : 2 : 1
• C. 2 : 1 : 1
• D. 4 : 2 : 1 : 1

Answer 1

The correct option is A 3 : 3 : 1 : 1

The given dihybrid cross is represented as follows:


The individuals showing same phenotypes are grouped as follow:


Hence, the required phenotypic ration is 3 : 3 : 1 : 1.