GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If a man with blood type AB has children with a woman with blood type B, which of the following is NOT possible in their offspring? Assume you do not know if the woman is homozygous or heterozygous.
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Type AB
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Type A
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Type B
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Type O
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Explanation:
Detailed explanation-1: -The children of a man with type B blood and a woman with type AB blood could be type A, type B, and type AB, but not type O.
Detailed explanation-2: -IA i x IA IB = IA IA (A Blood group), IB i (B Blood group) or IA IB (AB Blood Group), therefore O blood group would not be possible. Thus, the correct answer is option D.
Detailed explanation-3: -For example, a man who has type AB blood could not father a child with type O blood, because he would pass on either the A or the B allele to all of his offspring. Despite their usefulness in this regard, ABO blood groups cannot be used to confirm whether a man is indeed a child’s father.
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