Biology, 22.01.2021 14:00 greend0719

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?

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Emily’s friend Mark recently learned that he was adopted; although his parents tried to keep it a se...