Question

A father has heterozygous A blood type, and his son has O blood type. What is the genotype of the mother

Answer 1

Explanation:
With a Child's blood type of O the parents will be a combination of:
O and O
or
A and A
or A and B
or B and B.


Answer:
Since we know the father is A, then the mother must be O.

Since With the Parents' combination of blood types of A and O, the child can have the following possible blood types: A or O.