Question

Emily’s friend Mark recently learned that he was adopted; although his parents tried to keep it a secret for as long as possible, he realized that he could not be their biological son because he has brown eyes, a dominant trait, while they both have blue eyes, a recessive trait.

Is Mark correct in assuming he must be adopted because of his difference in eye colour?

Answer 1

Step-by-step explanation:

Two blue eyed parents have a brown eyed baby Although it is uncommon, parents with blue eyes can have children with brown eyes. The inheritance of eye color is more complex than originally suspected because multiple genes are involved.