Essentials of Genetics 9th Edition by Michael Palladino William Klug, Michael Cummings, Charlotte Spencer

Exercise 4

With regard to the ABO blood types in humans, determine the genotypes of the male parent and female parent:
Male parent: blood type B whose mother was type O
Female parent: blood type A whose father was type B
Predict the blood types of the offspring that this couple may have and the expected ratio of each.