Eye-based Paternity Testing & Other Human Genetics Myths

Oh, if I had a dime for every time a character recognized a long-lost parent or sibling based on eye color, a widow’s peak, a peanut allergy, or some other physical quirk. Sure, first-degree relatives do tend to look alike, and many visible traits tend to run in families. Yet they should not be used to establish (or disprove) kinship because it’s not that simple.