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, O+ 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

Answer 1

Answer:

Child phenotype MN, O+ and its genotype = MN; ii; Rh+ Rh-

The following couples are possible parents for the child.

1). Mother type M, A+ = MM; IAi : Rh+Rh+ x Father typeN. B- = NN; IBi ; Rh-Rh-

3). Mother type MN, B+ = MN; IBi : Rh+Rh- x Father type N, O+ = NN; ii ; Rh+Rh-

4). Mother type MN, O+ = MN; ii : Rh+Rh+ x Father type N, O+ = NN; ii ; Rh+Rh-

The following couple is not possible parent for the child

2). Mother type MN, AB- = MN; IAIB : Rh-Rh- x Father type M, O- = MM; ii ; Rh-Rh-