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Rutilismo is responsible for a genetic characteristic of occurrences red hair, or by and / or hair coloring red or reddish. The presence of red hair occurs in approximately 1-2% of the human population. It occurs more frequently (2-6%) in people whose ancestors come from the north or western Europe and less frequently in other populations. In 1997 it was discovered the biochemistry of red hair, demonstrating that these are associated with receptor melanocortin-1 and component iron. It is believed that the gene associated recessive would have an antique. All redheads have variants in the region MC1R of chromosome 16.
The place in the world with the highest percentage number of red is the United Kingdom, especially Scotland. It is estimated that 10-13% of the Scottish population has red hair. The presence of red in Portugal occurs occasionally from north to south. Interestingly, the village called A Dos Gurnard took its name due to the presence of a large number of red on site. According to the anthropologist and physician Eusebio Tamagnini a survey conducted on hair pigmentation, published in 1936 by the University of Coimbra, and in other studies produced by Mendes Correa, Cardoso Fonseca and Lopes Gonçalves, the average red in Portugal is 3%.
Red hair varies from dark burgundy red color to orange charred to bright copper-red color. This hair has a characteristic reddish pigment pheomelanin pigment eumelanin high levels and low levels of the dark. Red hair has nothing to do with skin color bright, color iris varies (gray, blue, green and fawn), freckle, and sensitivity to light Ultraviolet. European cultural reaction against this hair varies from defamation to admiration; many common stereotypes stating that a person with red hair have a high temper.
At least 4% of the European population has naturally red hair. Red hair commonly found on the descent Nations Germanic and Celtic. Residents of Scotland has the highest proportion of red hair; 13% of the total population have red hair and at least 40% of the population carries the recessive redhead gene. Ireland is second on the percentage; as much as 10% of the total population in Ireland has red hair, reddish brown and reddish blonde.
A 1956 study in the British army recruits also showed high levels of red hair in Wales and the border between England and Scotland. Red hair is also quite commonly found in people of Ashkenazi Jewish, possibly due to the inclusion of DNA flow of weddings cross Europe for centuries. In the European culture before the 20th century, red hair is often regarded as one of those physical properties of a Jew : During the Inquisition Spain, everyone with red hair is identified as a Jew. In Italy, red hair is associated with the Jewish community there, and Judas Iscariot is described as having red hair painting in Italy and Spain. The author of Period of William Shakespeare to Dickens makes the character of the Jews with the characteristic red hair. The stereotype terhdap redheads are descended Jews still believed in most of Eastern Europe and Russia.
In the United States, an estimated 2-6% of the population has red hair Toral. This means that the US is the country with the largest population of redheads in the world, with a number of 6-18 million, compared to 650,000 in Scotland and 420,000 people in Ireland.
Berbers in Morocco and Algeria north also has some redheads. The frequency of red hair significantly, especially among people Kabyle of Algeria, as much as 4%. Queen Morocco, Lalla Salma wife of king Mohammed VI, has red hair. Abdurrahman I also have red hair, her mother was a Christian slave Berber.
In Asia, red hair can be found in people of Sham or the Levant region (such as Syria, Lebanon, Jordan, Iraq, Israel and Palestine ), In Turkey, the Caucasus, Central Asia also among those with the Indo-Iranian descent, such as the Persians, Tajik people, Lor, Kurds, Pashtuns, Nuristani and Dard. Emigration of Eurasia and North Africa added the red-haired human population in the continent America, Australia, New Zealand and southern Africa.
A tradition among astrologers bone diz that at the time that a person born hair Russia, or the planet Mars tien probabilidatz be more or planet that debante for this Horizont's not a con to other cheneral populations.
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