The ABO blood group gene has three alleles with IA and IB co

The ABO blood group gene has three alleles, with IA and IB codominant, and i recessive. The Rh blood group gene has only two alleles, with the Rh+phenotype (R allele) dominant over Rh– (r allele). Finally, the MN blood group gene hastwo codominant alleles, M and N.

A child has blood types B, Rh–, and M. His mother has blood types O, Rh+, and MN.Give the genotype of the mother, and the possible genotypes of the father.

Solution

As the mother having O blood group, the genotype of mother is ii. As the child contain Rh-, the possible Rh group is Rr. So, the mothers genotype is iiRr and MN.

Fathers possible genotypes are

I^BI^Brr and MM

I^BI^Brr and MN

I^Birr and MN

I^Birr and MM

I^BI^BRr and MM

I^BI^BRr and MN

I^BiRr and MN

I^BiRr and MM