Blood type is inherited thriugh mutiple alleles , inculding I ^a , I^b and i . A child has type A blood. If the father has type AB blood , what are all the possible phenotypes of the mother

The answer is below

Explanation:

The possible phenotypes of the mother can be any of the following

AA - A phenotype

AB - AB phenotype (here the mother must have contributed an A gene for it to be possible)

AO - A phenotype (here the mother may have contributed any of the A or O gene.)

BO - B phenotype (here, the mother would only need to contribute O gene for this to be possible)

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