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A man of blood group AB marries a woman of blood group O. What blood groups can their children possibly show?
AOnly AB
BA and B only
CA, B, AB and O
DAB and O only
Answer & Solution
Correct answer: B. A and B only
The father (I^A I^B) gives either I^A or I^B. The mother (ii) gives only i. Children are therefore I^A i (group A) or I^B i (group B). Neither AB nor O is possible.
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