If both parents are heterozygous for a trait. the probability that an offspring will be...

Biology

JAMB 2021

If both parents are heterozygous for a trait. the probability that an offspring will be recessive for that trait is?

A. 1/2
B. 1/4
C. 1
D. 3/4

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Correct Answer: Option B

Explanation

In genetics, when both parents are heterozygous for a trait (Aa), the possible combinations for their offspring can be AA, Aa, aA, or aa. The probability of an offspring being homozygous recessive (aa) is 1 out of 4, or 1/4. So, the correct answer is '1/4'.

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