Question

parents with the genotypes ao and ab have a child. what are all the possible blood types of the child?
o a, b
o, ab
a, ab, b
o, ab, a

Explanation:

Step1: Identify alleles from parents

The parent with genotype AO can contribute either A or O allele. The parent with genotype AB can contribute either A or B allele.

Step2: Use Punnett - square logic

We consider all possible combinations:

• If the first parent contributes A and the second contributes A, the child's genotype is AA (blood - type A).
• If the first parent contributes A and the second contributes B, the child's genotype is AB (blood - type AB).
• If the first parent contributes O and the second contributes A, the child's genotype is AO (blood - type A).
• If the first parent contributes O and the second contributes B, the child's genotype is BO (blood - type B).

Answer:

A, AB, B