Athlete, Team: Ryan Lochte, American Olympian 

Physical Trait: Cheek Dimples 

Not as rare as some of the other traits on this list, cheek dimples, like those of Olympic swimmer Ryan Lochte, are possessed by 20 percent of the population. Although, unlike many uncommon characteristics, dimples are not a recessive trait. Which means that if two parents each have dimples, their children have a 50-100 percent chance of passing it on.