Jessica's mother has blue eyes, with two recessive genes for blue eyes. Her father has brown eyes, with a dominant gene for brown eyes and a recessive gene for blue eyes. What are the chances that Jessica has blue eyes?
A) 0 percent
B) 75 percent
C) 50 percent
D) 25 percent

Question

Quizplus · Accepted Answer

Both of Jessica's parents carry a recessive gene for blue eyes, so they each have a 25% chance of passing on that gene to Jessica. If they both pass on the recessive gene, then Jessica will have blue eyes. Therefore, the chances of Jessica having blue eyes are 50%.

Jessica's Mother Has Blue Eyes, with Two Recessive Genes for Blue