Question

In a dihybrid cross, the maximum number of phenotypes would be

• A. 8
• B. 4
• C. 2
• D. 16
• E. 12

Answer 1

Answer: (B)

4

A cross is made between homozygous yellow round seeds(YYRR) to another homozygous green wrinkled seeds(yyrr). In the F1 generation, all plants are heterozygous yellow round(YyrRr). When this plant is subjected to self pollination, in the F₂ generation, four types of phenotypes appear. They are9 plants are Yellow round, 3 plants are yellow wrinkled, 3 plants are green round and 1 plant is green wrinkled are formed.

So, the correct option is ‘4’.