Question Detail

BIO 101 BIO 101 Past Questions Objective Question

Question

If one parent is heterozygous & the other is homozygous recessive, what is the percentage chance of offspring being heterozygous?
Options
A 25%
B 50%
Correct Answer
C 75%
D 100%
Correct Answer

Option B is the correct answer.

Detailed Explanation

Cross: Heterozygous (Aa) x Homozygous recessive (aa). The Punnett square shows: Aa x aa -> 50% Aa (heterozygous) and 50% aa (homozygous recessive).

Hint

Do a Punnett square cross between Aa and aa. How many of the offspring are Aa?

Question Info