Question

With regard to the ABO blood group typing system, if a father is of blood group AB and a mother is of blood group O, what are the possible blood groups that a son of the couple have?

• A. O only
• B. Either A or B
• C. AB only
• D. AB, A, B, and O

Hint:

In the ABO blood group system, a child can inherit one allele from each parent. The father’s AB genotype and the mother’s OO genotype lead to the possible blood groups A or B for the child.

Answer 1

The Correct Option is B

- The father has blood group AB, so his genotype is AB. He can pass on either an A allele or a B allele to his offspring. - The mother has blood group O, so her genotype is OO. She can only pass on an O allele to her offspring. The possible combinations for the child’s genotype are: - Inheriting the A allele from the father and the O allele from the mother will result in blood group A (AO). - Inheriting the B allele from the father and the O allele from the mother will result in blood group B (BO). Thus, the possible blood groups for the child are A or B.
Conclusion: The correct answer is Option 2: Either A or B.