5
QuizMultiple Choice

Genetics and Heredity — Test

Question 5 • CMS 2026-2027 Biology CREDIT RECOVERY

In a dihybrid cross for round and yellow seeds (RrYy x RrYy), what is the probability of having green and wrinkled seeds? Key: R is equal to round r is equal to wrinkled Y is equal to yellow y is equal to green

Answer
A
1 : 16
B
3 : 16
C
8 : 16
D
9 : 16

Explanation

In the RrYy × RrYy cross, each parent has a 1/4 chance of passing on r and a 1/4 chance of passing on y. Green and wrinkled seeds must be rryy, so multiply the independent probabilities: 1/4 × 1/4 = 1/16. The correct choice is A, 1 : 16.

AI-written and checked against the verified answer.

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