Question

Davenia has Type AB blood. Her husband, Brayden, has type B blood. If their child is type A blood, what is the fathers genotype? (You will have to complete two Punnett squares because there are two types of Type B Blood).​

Answer 1

The genotype of the father would be
`I^(B)i`.

Step-by-step explanation:

The genotype of the mother would be
`I^(A)I^(B)`.

The genotype of a father could be
`I^(B)i` or
`I^(B)I^(B)`.

If the genotype of a father would be homozygous
`I^(B)I^(B)`, then the blood group of offspring would be either B or AB but not A.

In contrast, if the genotype of a father would be heterozygous
`I^(B)i`, then the blood group of the offspring would be either A, B, or AB.

Thus, the father must be heterozygous (
`I^(B)i`) if the blood group of the child was A.