(Originais Teachy 2023) - Question Hard of Sciences

In a genetics experiment, a couple plans to have children and decides to investigate the probability of a child being born with a specific blood type. The father is heterozygous for the ABO system, meaning he has an allele for blood type A (IA) and an allele for blood type B (IB). The mother is homozygous for blood type O (ii). The ABO system is determined by a locus with multiple alleles, where IA and IB are co-dominant and both dominate the i allele, which is recessive and determines blood type O. Write a paragraph briefly explaining how alleles combine to determine blood types in the ABO system, and then calculate the probability that the couple's first child will be born with blood type A. Consider that meiosis and fertilization occur without genetic recombination and that the child's sex does not influence the blood type outcome.