The answer is D) IBi
A mother has either AA or AO genotype. Since her daughter has OO genotype, the one O allele is from a father and one is from the mother. Thus, mother must have allele O. So mother's genotype is AO.
A mother with AO genotype will pass to her son either A or O allele. Since son is type B negative, it could inherit from mother only O allele. Son's genotype is BO. This means that he inherited from the father B allele.
Talking of Rh, her son is type B negative. A negative Rh phenotype contains both recessive alleles r.
Therefore, the son genotype is BOrr. In terms of the alleles for the I locus, it can be represented as \(I^{B}\)i.
