Imagine that you are a genetic counselor, and a couple planning to start a family comes to you for information. charles was married once befor, and he and his first wife had a child with cystic fibrosi. the brother of his current wife, elaine died of cystic fibrosis. what is the probability that charles and elaine will have a baby with cystic fibrosis?(neither charles nor elaine has cystic fibrosis.)