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Solution


Q.

A man with blood group ‘A’ marries a woman with blood group ‘B’. What are all the possible blood groups of their offspring              [2015]
1 A, B, AB and O  
2 O only  
3 A and B only  
4 A, B and AB only  

Ans.

(1)

The man has blood group A, thus its genotype can either be IAIA or IAIO. Similarly, woman can either have IBIB, or IBIO genotype. Thus, their offspring can have any of the blood groups A (IAIA or IAIO), B (IBIB or IBIO), AB (IAIB) or O (IOIO).