Homozygous B means that the female posses [tex]I ^{B} I^{B} [/tex]
Heterozygous A means that the male posses [tex] I^{A} I^{O} [/tex] (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.
