Red hair or ginger hair occurs naturally in one to two percent of the human population , appearing with greater frequency two to six percent among people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein. Red hair varies in hue from a deep burgundy or bright copper , or auburn , to burnt orange or red-orange to strawberry blond. Characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin , it is associated with fair skin color , lighter eye color , freckles , and sensitivity to ultraviolet light. Cultural reactions to red hair have varied from ridicule to admiration with many common stereotypes in existence regarding redheads. The term redhead has been in use since at least
That's approximately million people. That's according to a study by a German sex researcher who found that women with red hair had sex more often. A similar English study found that redhead gals had sex an average of three times a week, while our blonde and brunette counterparts have it twice a week.
Whether they've made us laugh, swoon, or reminisce, all these celebrities have one thing in common: They experimented with red hair. Here, a look back at the most striking reds throughout the decades. Riverdale 's resident redhead is very proud of her cherry locks and even recorded a funny PSA in support of all redheads.