Q. A man with blood group ‘A’ marries a woman with blood group ‘B’. What are all the possible blood groups of their offsprings?
(a) O only
(b) A and B only
(c) A, B and AB only
(d) A,B, AB and O
Solution :
Correct option : D A man with blood group A has an antigen on its RBC encoded by gene IA and antibody for B. Similarly, a woman with blood group B has B antigen on its RBC encoded by gene IB and antibody for A. A man with blood group ‘A’ marries a woman with blood group ‘B’, the possible blood groups of their offspring can be A, B, AB, and O because they have both antigen A and B and antibodies for both A and B.