The following question deals with the ABO blood group. Recall that A and B alleles are co-dominant over the allele O. Jill, who has type AB blood, marries Jack who has type B blood, but whose mother has type O blood. What are the genotypes of Jack, Jill, and Jack's mother?

Jill genotype will be expressed predominately

Explanation:

Further explanation is given in the picture

explanation:

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