Doctors break it down.

Your genetic make-up determines a wide range of physical traits, and eye and hair color are among the most visible. Many people inherit shades that are common across the globe, such as brown eyes or ...

"Hearst Magazines and AOL may earn commission or revenue on some items through these links." · New research suggests red hair has persisted for thousands of years for a reasons. · The red hair gene ...

Add Yahoo as a preferred source to see more of our stories on Google. Your genetics dictates your hair color, but that means other genes may be lumped in, too. New research suggests that people with ...