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 ?
Our picture gallery presents a selection of 10 famous and inspiring redheads:
By midday, 1,200 people had showed up, said organiser Pascal Sacleux, who expressed the hope that "one day the jokes at the expense of redheads will be a thing of the past, when everyone realises how unfounded and stupid they are".
Such cultural characterisations have evolved into myths about what all redheads are like, suggesting they are aggressive and violent.
The majority of redheads have brown, hazel, or green eyes.
Before receiving his award, Gary gave a shortened version of his one-man show and belted out his favourite songs, composed by or sung by famous redheads.
The non-profit Irish Redhead Convention partners with the Irish Cancer Society every year and has raised more than [euro]30,000 for the national charity to date, because redheads are one of the groups most susceptible to melanoma and other skin cancers.
"I love that we all share common experiences as redheads and there is an understanding and camaraderie as we all stand together.
It is higher overall than Ireland, disputing preconceptions of the Irish as the most redheaded.
Red hair also tends to skip generations, so if you are a redhead, your children may not be born with red hair, but your grandchildren may.
To mark national Redhead Day hundreds of flame-haired folk from across the country made their way to Manchester for an annual celebration of all things ginger - and this year they even had their own awards ceremony - the MOGOs.
The United States has the highest number of redheads in the world.