Suppose a couple comes to you for genetic counseling. both of them have a genetic disorder, but they already have one child who does not have the disorder. they would like to have more children. assuming the genetic disorder is autosomal, explain to them the probability of future offspring being normal or having the disorder. be sure to tell them whether the disease is brought about by a dominant or recessive allele and what fraction of their children (if any) could be carriers for the disorder