Question

A woman with type O blood (OO), which is a recessive condition, has a child with a male with type AB blood (AB). What are the possible phenotypes of their offspring?

Answer 1

Phenotypes of offsprings: Type A, Type B

Step-by-step explanation:

This question involves a single gene for blood group in humans. The ABO blood group system consist of three alleles: A, B, and O. A and B are dominant over O but co-dominant to one another.

If a woman with type O blood (OO) has a child with a male with type AB blood (AB) i.e OO × AB, the following gametes will be produced by each parent:

OO - O

AB - A and B

Using these gametes in a punnet square (see attached image), the offsprings with the following genotyoes will be produced: AO (2), BO (2)

AO - phenotypically type A

BO - phenotypically type B

Hence, a type A and type B blood group offsprings will be produced.