Brown eye-color alleles are dominant over blue eye-color alleles,which are recessive.Jenna has brown eyes.Her husband,Bill,has blue eyes.Jenna and Bill are the biological parents of James,who has blue eyes.What eye-color gene alleles must Jenna have?

Question

Quizplus · Accepted Answer

Since James has blue eyes and blue eye-color alleles are recessive, he must have received a blue allele from each parent. Jenna, having brown eyes but passing on a blue allele to James, must be heterozygous (Bb).

Brown Eye-Color Alleles Are Dominant Over Blue Eye-Color Alleles,which Are