If sun tanning darkens skin tone, then insufficient sun should result in fairer skin and red hair. This was discovered by scientist after having studied the gene evolution of 1,000 people from Spain. "The 'ginger gene,' or 'V6OL allele,' showed up 50,000 years ago after humans left Africa for colder climates. This gene made human’s skin lighter, as they were exposed to less vitamin D from the sun" [Irish Central, 26 March 2015].
Irish Central referred to another study by the BritishDNA found on the Mail Online two years ago. The BritishDNA study was based on data from 2,343 people who have undergone DNA tests to learn more about their ancestry. They created the first-ever map detailing the distribution of red-headed genes. They looked at three different variants of the MC1R gene which causes red hair; those with 151-Cysteine-red have a 70,000 year old variant that probably arose in West Asia, those with 160-Tryptophan-red are descendants of someone who probably also lived in West Asia 70,000 years ago, and 294-Histidine-reds belong to a much younger group who come from a European who lived about 30,000 years ago. The BritishDNA concluded that for a child to develop red hair, both parents must be carriers of one of these red-hair gene variants. But even then there is only a 25 per cent their child will be born ginger.
Irish central also points to ScotlandsDNA Project in 2012 that found the Celts flaming red hair was caused by the weather. The experts believe that the gloomy climate in Scotland has seen a deliberate genetic adaptation. The red hair helps to take advantage of sunny days and allows the body to absorb more vitamin D. Unfortunate, redheads suffer more discrimination per head of population than ethnic minorities. The Centre for Equality Policy Research said that, "A job applicant with ginger hair is seven times more likely to be rejected than a dark-haired applicant, and eight times more likely than a fair-haired applicant."
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