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Bad Weather and Genetic Mutations Make Scots Red-Headed
The smaller groups ended up forming genetic bottlenecks-small gene pools in which chance mutations such as red hair were able to come to the fore.
There is complex genetics behind red and blond.
For example, one of the main genes for hair colour has 40 variants - but only about six cause red hair. People must inherit two of these six genes - one from each parent - to have red hair.
But the chances of this are always small, and thus there are so few redheads.
The best chance occurs in stable rural communities with a common ancestry - where people carrying the genes are likely to meet and have children.
"The smaller your sample the more likely something rare is going to happen," Times Online quoted Pritchard, 26, a student at the MRC Human Genetics Unit at the Western General Hospital, as saying.
"The Celts, by chance, had a high frequency of the ginger mutation, which was able to persist over time," she added.
Source-ANI
TAN
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More News on: Genetics and Stem Cells, Von Recklinghausen's Disease, Crigler-Najjar Syndrome, Gilbert’s Syndrome, McArdle Disease
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