Question

If you have a homozygous B blood female who mates with a heterozygous A blood male , what are the possible blood type of their children? ( human genes)

Answer 1

Homozygous B means that the female posses $I ^{B} I^{B}$
Heterozygous A means that the male posses $I^{A} I^{O}$ (A and B are both dominant while O is recessive to the two so if it is heterozygous A or B then O must be the other allele.

View the Punnett Cross below:

Thus based on the cross, there is a 50% chance that the offspring would be blood type AB and 50% chance the offspring would be blood type B.

Note: the blood type is the superscript on the base I.