The single mutation was found in a long gene sequence called KIT ligand (KITLG) and is present in about one-third of Northern Europeans. People with these genes could have platinum blond, dirty blond or even dark brown hair.
“There’s a half dozen different chromosome regions that influence hair color,” said study co-author David Kingsley, an evolutionary biologist at the Howard Hughes Medical Institute and Stanford University in
California. “This is one, but not the only one. The combination of variants that you have at all those different genes — that sets your final hair color.” [Top 10 Things That Make Humans Special]