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,AB- 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:

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

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

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

d. None of These

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

Explanation / Answer

Answer is B- mother type M A+ and father type N,B-. If mother is heterozygous for rh factor then one of offspring can have MN AB- blood group.

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