Human blood groups are an example of codominance. The blood types are A ( IAi, IAIA), B (IBi, IBIB), AB (IAIB), and O (ii). A man who is type AB ( IAIB) marries a woman who is type O (ii). What are the chances that their child will have a) type AB blood, b) type O blood, c) type A blood, and d) type B blood?