Red hair occurs naturally on approximately 1–2% of the human population. It occurs more frequently (2–6%) in people of northern or western European ancestry, and less frequently in other populations. Red hair appears in people with two copies of a recessive gene on chromosome 16 which causes a mutation in the MC1R protein.
Red hair varies from a deep burgundy through burnt orange to bright copper. It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin. The term redhead (originally redd hede) has been in use since at least 1510. It is associated with fair skin color, lighter eye colors (gray, blue, green, and hazel), freckles, and sensitivity to ultraviolet light.
Cultural reactions have varied from ridicule to admiration; many common stereotypes exist regarding redheads and they are often portrayed as fiery-tempered.
Read more about Red Hair: Biochemistry and Genetics, Red Hair of Pathological Origin
Famous quotes containing the words red and/or hair:
“If you don’t begin to be a revolutionist at the age of twenty, then at fifty you will be a most impossible old fossil. If you are a red revolutionary at the age of twenty, you have some chance of being up-to-date when you are forty!”
—George Bernard Shaw (1856–1950)
“Beloved, let your eyes half close, and your heart beat
Over my heart, and your hair fall over my breast,
Drowning love’s lonely hour in deep twilight of rest....”
—William Butler Yeats (1865–1939)