GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AB only
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A and B
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A, B and AB
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A, B, AB and O
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Detailed explanation-1: -These antigens determine the sort of blood type. Blood type A has antigen A, B has antigen B, AB has both antigens, while blood type O doesn’t carry any antigen. So, the child can have blood type A or B which differs from parents. Hence, the correct answer is option C.
Detailed explanation-2: -When both parents have blood group AB(IAIB) then offsprings can have blood groups A(IAIA), B(IBIB), or AB(IAIB) but not O as allele i is not present in any of the parent.
Detailed explanation-3: -Solution: Yes, a child can have blood group O if both of his parents have blood groups A and B. The gene I controls ABO blood grouping in humans.
Detailed explanation-4: -You need to get an O allele from both parents to have blood type O. The AB parent has no blood allele to give, so his child can’t be blood type O.