If the mother has a blood group B with a homozygous genotype and father has a blood group A of unknown genotype, then the possible blood groups of the children are:
AB and A
A and B
AB and B
The correct option is D AB and B In the given question, the mother has blood group B with homozygous genotype and hence can be represented as IB IB. However, the father has a blood group A with unknown genotype. Hence, he can have a homozygous (IA IA) or a heterozygous (IA IO) genotype. - If the father is homozygous,
then the blood group of the progeny can be AB -If the father is heterozygous,
then blood group can be AB or B.
Hence, progeny can have either AB or B as their blood group.