Question

3. A man with blood group a (heterozygous) marries a woman with blood group b (heterozygous). What will be the blood groups of their children?

Answer 1

Answer: A, B, AB or O.

Explanation:

The genotype of the blood group of the man( heterozygous): AO

The genotype of the blood group of the woman( heterozygous): BO

When these two genotypes are crossed, the F1 generation results in the progenies with the following probable blood groups:

AB, AO, BO and OO

Since, A is dominant over O and B is dominant over O, so the resulting blood groups are either: A, B, AB or O.