Question

The ABO blood groups in humans are determined by a multiple-allele system in which IA and IB are codominant and are both dominant to IO. A newborn infant is type A. The mother is type O. Possible phenotypes of the father are

Answer 1

Answer:

The possible genotype of the father will be AA or AO meaning of type A blood

Explanation:

The ABO blood group system can be regarded as the classification of human blood which is determined by the presence or absence of the antigens A and B, which are carried on the surface of the red cells (erythrocytes). An individual may therefore have type A, type B, type O, or type AB blood.

For a mother to be of type O blood, it means her genotype is OO and is inherited in the recessive form. The infant of type A can have a genotype of AO or AA. Thus, the possible genotype of the father will be AA or AO meaning of type A blood

           IO        IO                      IO         IO

IA        IAIO     IAIO         IA      IAIO      IAIO

IA        IAIO     IAIO         IO      IOIO     IOIO