Q.

Which one of the following blood groups is not possible in children from parents with combination B × AB ?

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a

A

b

B

c

AB

d

O

answer is D.

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Detailed Solution

If the parents are having blood groups B and AB then O blood group is not possible. This is because the AB blood group has a genotype of IAIB and B blood group can have genotype IBIB or IBi. Therefore, the possible blood groups in the offspring are A, B, AB but O blood group is not possible.
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Which one of the following blood groups is not possible in children from parents with combination B × AB ?