Answer to Question #147145 in Genetics for Vaith

Question

The human blood groups of ABO system are determined by three allelic genes: IA, IB, i0 . The combination of alleles i0 i0 determine the I(O) blood group, IA IA or IA i0 - II (A); IB IB or IB i0 - III (B); IA IB - IV (AB). In a family, in which mother has II blood group (heterozygote), her husband - I blood group. Determine the possible blood groups of their children.

Answer 1

The father's blood group will be I (O) and the mother's II (A) heterozygous, a combination of IA iO. In such a scenario, a cross between the two parents will give birth to children with the following combination of blood groups; 2(IA iO) - II (A) and 2(iO iO) - I (O).