This problem refers to the MN and ABO loci mentioned in class. It also refers to

Question

This problem refers to the MN and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype MN, B- based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

Select one or more:

Mother Type M, A+ and Father Type N, B-

Mother Type MN, AB- and Father Type M, O-

Mother Type MN, B+ and Father Type N, O+

Mother Type MN, O+ and Father Type MN, A-

None of These

Explanation / Answer

Answer. Mother type M, A+ and Father type N- B-

Here, mother is Heterozygous for blood group A+ as IA+IO

Father is Heterozygous for his blood group as IB-IO.

By these genotypes, we have possibility to have child with blood group B- genotype as IB-IO

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