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  4. If mother's blood group is A and father's blood group is B, child's blood group could be

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Q. If mother's blood group is A and father's blood group is B, child's blood group could be

NTA AbhyasNTA Abhyas 2020Principles of Inheritance and Variation

Solution:

ABO blood group is controlled by gene I and its types are IA, IB and IO.
As mother is A and the father is B, the possible genotypes for parents are - Mother - $I^{A} I^{A} / I^{A} I^{O}$ and Father - $I^{B} I^{B} / I^{B} I^{O}$ .
Therefore, the child's blood group genotype possibilities are -
$I^{A} I^{A} / I^{A} I^{O} - A$
$I^{B} I^{O} / I^{B} I^{O}-B$
$I^{o}I^{O}-O$
$I^{A}I^{B}-AB$