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Parents of blood O and AB cannot have a ...

Parents of blood O and AB cannot have a child of group AB because

A

Gene O is dominant over gene A

B

Gene O is dominant over gene B

C

Gene A or B is absent in on of the parents

D

Gene A and B is absent in on of the parents

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The correct Answer is:
D
Hetrozygous `I^(A)//I^(B)` individual are blood group AB. Both the A antigen ( product of the `I^(B)` alleles) are produced by them.
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