Free ear lobes are dominant to attached lobes and the ability to roll your tongue is dominant. Bob has free ear lobes and can easily roll his tongue. His mother cannot roll her tongue and has free ear lobes. His father has attached ear lobes and can roll his tongue. Barbara (Bob's wife of 3 years) has attached ear lobes and can roll her tongue. Her mom has also has attached ear lobes but cannot roll her tongue. Bob and Barbara are going to have a child. There is 25% chance that their child will have attached ear lobes and lack the ability to roll its tongue. True or false?