If both parents have AB blood groups, the possible blood groups of their offspring are?
Everyday Science / Biology — Multiple-choice practice
- A. A, B, AB, or O
- B. A or O
- C. Only AB
- D. A, B, or AB
Correct answer
A, B, or AB
Explanation
Explanation If both parents have AB blood groups (genotype IAIB), their offspring can have blood types A, B, or AB, but not O. This is because blood group O requires two recessive "i" alleles, which are not present in either parent's genotype.
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