Juan and Kaya would like to have a baby. They are getting tested to determine if either of them is a carrier of a recessive gene for sickle-cell disease. What is the likelihood that their child would develop the disease if both parents are carriers?

Question

Quizplus · Accepted Answer

When both parents are carriers of a recessive gene for sickle-cell disease, there is a 25% chance that their child will inherit two copies of the mutated gene and thus develop the disease. The other possible outcomes are that the child inherits one copy of the mutated gene and is a carrier like the parents (50% chance), or inherits two normal copies of the gene (25% chance).

Juan and Kaya Would Like to Have a Baby