19. Blood type is controlled by a gene with multiple alleles. A produces type A blood. B codes for type B blood. A and B are codominant so a heterozygote has type AB blood. The O allele is recessive to both A and B and produces type O blood. A. What are the possible genotypes of a man with type A blood? B. What are the possible genotypes of a man with type B blood? C. Can a man with type B blood be the father of a baby with type O blood? Why or why not? Explain your answer. D. A man with type A blood marries a woman with type B blood. What blood types are possible for their children? Explain your answer. E. A man with type O blood is in a car accident and has to receive a transfusion at the hospital. What types of blood can he receive? F. In the Charlie Chaplin paternity case of the 1940 s, a young woman sued Chaplin for child support, claiming he was the father of her child. Chaplin's blood was type O, the mother was type A and the baby was type B. Could Charlie Chaplin have been the father of the baby? Explain your answer. G. If a person has a blood type that matches the blood of a baby or matches the blood found at the scene of a crime, does that prove he is the father of the baby or the person who committed the crime? Explain your answer..