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Question

If a man having blood group AB marries woman having blood group B, then which of the blood groups is not possible in the progency?

A

A

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B

B

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C

AB

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D

O

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Solution

The correct option is: D

Explanation of the correct option:

The man has blood group AB, thus its genotype is IA IB. The woman has blood group B, thus its genotype can either be IB IB or IB IO.

In any of the cases, the genotype IO IO will not be produced. Thus, none of the offspring an has O blood group.

IA IB
IB IAIB IBIB
IB IAIB IBIB

"

or"

IA IB
IB IAIB IBIB
IO IAIO


Explanation of the incorrect option:

Option A: If a man having blood group AB marries a woman having blood group B, then O blood group is not possible in the progeny.

Option B: If a man having blood group AB marries a woman having blood group B, then O blood group is not possible in the progeny.

Option C: If a man having blood group AB marries a woman having blood group B, then O blood group is not possible in the progeny.

Final answer: If a man having blood group AB marries a woman having blood group B, then O blood group is not possible in the progeny.


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