Question

A dihybrid cross is created from plants that are heterozygous for both round seeds and yellow seed color. What is the ratio of offspring that have round seeds and yellow seed color?

Answer 1

Based on the given scenario, the ratio of offspring that have round seeds and yellow seed color would be 9:16. Hope this is the answer that you are looking for. 

Answer 2

Answer:

1 : 1

Explanation:

According to the question, the parents are heterozygous (RrYy) and each would produce four types of gametes: RY, Ry, rY, ry.

Random mating between gametes of two parents gives phenotype ratio 9 round yellow: 3 round green : 3 wrinkled yellow : 1 wrinkled green.

Hence, ratio of round seeds ( 9 + 3 ) to yellow seeds color (9 + 3) is 12:12 = 1:1.