What blood groups can a child have if the father has her of the fourth group, and the mother of the first group.

The blood group is determined by three alleles: 0, A, B.

The genotype of people with the first blood group is 00.

From the second – A0 or AA.

From the third – B0 or BB.

From the fourth – AB.

The mother has the first group (00), the father has the second (AB).

Gametes, which are formed in the mother – 0, father – A, B. Their combination gives only two genotypes: A0, B0.

Thus, a child whose parents have the first and fourth blood groups can have either the first group or the second.