🤓 Based on our data, we think this question is relevant for Professor Salihu's class at WVU.
The blood type of humans is expressed following a slightly different type of inheritance. This is because there are three alleles that could lead to differently expressed products: IA, is the allele that would result in blood type A, IB for blood type B, and i for blood type O. Furthermore, the alleles IA and IB are codominant to i. Thus, the genotypes IAIA and IAIO would actually result in blood type A, and IBIB and IBIO would result in blood type B.
A woman with type O blood is expecting a child. Her husband is type A. Both the woman's father and her husband's father had type B blood. What is the probability that the child will have type B blood?