Question

what is the possible genotype ratio among children with mother having a IAi and father having the genotype IAIB

Answer 1

Since the mother has a genotype Iai and the father IAIB, their four offerings will have different genotypes because the IAIB is a blood group AB which will be crossed to all four offerings. The first child will have IAIA, the second child IAIB, the third IAi, and four child IBi. Therefore the genotype ratio would be 1:1:1:1