Question

This question refers to the ABO blood type locus.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 the child below based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These". child: M, B Remember that the A and B alleles are codominant to each other and both are dominant to the O allele. Assume no epistatic interactions with the H locus. A woman is blood type AB. Her child is blood type AB. She wants to get child support from a man who is blood type A. Can this man be the father of the woman's child based on these data?

Answer 1

Answer:

Yes.

Explanation:

Codominance may be defined as phenomena in which both the traits express themselves equally. ABO blood group is the case of codominance. The AB blood group express themselves in equal proportion.

The woman has blood group AB ( IAIB). The child is also AB  ( IAIB). The man with blood type A can have the genotype (IAIA or IAi). The cross between the man and woman results in the progeny with blood type A, AB and B. Hence, the man with Blood type A can be the father of the child.

Thus, the answer is yes.