Question Detail
Question
A child with blood group genotype IAIB is born of a woman with genotype IBIB. The father could not be a man of genotype: A. IAIA B. IBIB C. IAIB D. IAIO
Correct Answer
Option B is the correct answer.
Detailed Explanation
The child is IAIB. The mother is IBIB, so she contributes an IB allele. Therefore, the child must have received the IA allele from the father. A father with genotype IBIB can only contribute IB alleles, not IA. So he cannot be the father.
Hint
The father must provide an A allele.