redhead

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redhead

adjective Referring to red (ginger) hair or a person with same.

noun A person with orange-red hair colour, or the hair itself, which is seen in 1–2% of the entire human population, 2–6% in Europeans, and 13% of Scots.

Genetics
Red hair is an autosomal recessive phenotype inherited when both patents have specific codon changes on MC1R, the melanocortin-1 receptor gene—aka, melanocyte-stimulating hormone receptor (MSHR). A ginger child can be born to non-ginger parents. The increase of red hair in northern Europe relative to Africa, where there is natural selection against light-coloured skin, has been attributed to a lack of negative selection, to genetic drift and possibly to sexual selection. Data suggest that gingers differ from non-gingers in sensitivity to pain and anaesthetics, which has been attributed to molecular cross talk between melanin-stimulating hormone (MSH) and pro-opiomelanocortin (POMC) and their respective receptors.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
"Red heads don't go out in the sun but are we meant to laugh at that and it's socially acceptable to put that out there, so that was what really got it started.
Austin, TX, March 18, 2011 --(PR.com)-- Consumers Vote for Their Favorite Celebrity Red Head and Raise Funds for Locks of Love Charity
Big Red, America's original and #1 selling red soda, announced the first-ever Ultimate Red Head Showdown.
Starting on March 17th and continuing through April 4th, Big Red will match up Red Headed movie stars, athletes, and other celebrities in head-to-head competition.
The spokesman added: "With Irish celebrities including Fair City's Celia Murphy, Kate Walsh and Jean Butler and international stars Isla Fisher, Lily Cole, Ashley Simpson-Wentz and Nicola Roberts flying the flag for gorgeous red heads, it is easy to see why Intense Red is also Ireland's favourite hair colour."
While blondes still have the most fun, and brunettes are the girls men want to marry, it seems we Irish like nothing better than a fiery red head between the sheets.
Alison Tay is deputy star style editor at Now magazine and can't get enough of red heads - literally.
'Julien Macdonald had Lily Cole in caramels which looked absolutely amazing on her and red heads can really carry off those colours which are in this season - it's a great time to be a red head.' And yes, by this point I'm positively falling off my seat with excitement.
'The more role models there are for red heads, the better.