Jessica's mother has brown eyes, with a dominant gene for brown eyes and a recessive gene for blue eyes. Her father also has brown eyes, with a dominant gene for brown eyes and a recessive gene for blue eyes. What are the chances that Jessica has brown eyes?

Question

Quizplus · Accepted Answer

Jessica has a 75 percent chance of having brown eyes because both parents are heterozygous (Bb) for eye color. The possible combinations for Jessica are BB, Bb, Bb, and bb, with three out of four resulting in brown eyes.

Jessica's Mother Has Brown Eyes, with a Dominant Gene for Brown