A pure pea plant with round, yellow seeds (RRYY) is crossed with a pure plant with wrinkled, green seeds (rryy), and the F1 plants are self-pollinated. What is the phenotypic ratio of the F2 generation?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 9 : 3 : 3 : 1
All F1 plants are RrYy with round, yellow seeds. On selfing, the two traits are inherited independently, so the F2 shows 9 round yellow : 3 round green : 3 wrinkled yellow : 1 wrinkled green.