Question

For Mendelian dominance, a man is homozygous and woman is heterozygous for a disease. What is the percentage of their homozygous children for the said trait?

• A. 50
• B. 100
• C. 25
• D. 75

Answer 1

The correct option is A 50

Parent generation : AA (father) X Aa (mother)

Gametes : AA----> Aa	A	A
A	AA	AA
a	Aa	Aa

F${}_1$ generation, genotype ratio is 1 AA (homozygous dominant) : 1 (heterozygous dominant). Thus, percentage of their homozygous children for the said trait is 50%.