where does red hair and freckles come from
Red hair The MC1R recessive variant gene that gives people red hair generally results in skin that is unable to tan. Because of the natural tanning reaction to the sun's ultraviolet light and high amounts of pheomelanin in the skin, freckles are a common but not all-inclusive feature of red-haired people. Eighty percent of redheads have an MC1R gene variant[2].
Red-light district The term red-light district originates from the red lights that were used as signs of brothels.[2]