Tony and Tina are both carriers of the same defective gene for a genetic disorder. As knowledgeable individuals, they know that each time they have a child there is a _____ risk that child will be a carrier for the disorder.

Question

Quizplus · Accepted Answer

Tony and Tina both carry the same defective gene, which means they each have one normal gene and one defective gene. When they have a child, each parent has a 50% chance of passing on the defective gene to the child. Therefore, there is a 50% chance that the child will be a carrier for the disorder. The chance of the child having the disorder itself depends on whether they inherit two copies of the defective gene, which would only happen if both Tony and Tina pass on their defective gene. This would result in a 25% chance of the child having the disorder.

Tony and Tina Are Both Carriers of the Same Defective