Round seeds (R) are dominant to wrinkled seeds (r) , and yellow seeds (Y) are dominant to green seeds (y) . A true-breeding pea plant with round and yellow seeds is crossed to a true-breeding plant with wrinkled and green seeds. The F₁ progeny are allowed to self-fertilize.
-What is the probability of obtaining a round, yellow seed in the F₂?

Question

Quizplus · Accepted Answer

The F1 generation will all be heterozygous (RrYy) for both traits. When these F1 plants self-fertilize, the F2 generation will follow a 9:3:3:1 phenotypic ratio for a dihybrid cross. The probability of obtaining a round, yellow seed (R_Y_) is 9/16.

Round Seeds (R) Are Dominant to Wrinkled Seeds (R), and Yellow