December 12, 2018
The enigma of orange hair was much more complicated than a thought of it.
It was believed that children were born redheads I was They need to inherit two copies of a gene from the name MC1R, one of the mother and another from the father.
Y MC1R Yes gen gen, that is, that can be exposed to birth genres and only when the person receives copies of the mother and the mother.
Anyway, not all people who inherit a MC1R orange hair gene, why did the scientists doubt that other factors play an important part, which they did not know so far.
Study of University of Edinburgh in the United Kingdom just show why the gene MC1R It only explains part of the enigma. This is the most genetic research done on redheads so far.
About 1 to 2% of the world's population is redhead, but in Scotland, the percentage is close to 13%, which equates to 650,000 people, according to the project ScotlandsDNA.
Scientists of University of Edinburgh The DNA was examined of almost 350,000 people who took part in the known British project UK Biobank, which collects information about health and genom more than 400,000 people The United Kingdom
When researchers took as much as the genome of redheads with people of black or brown hair, they were found eight differences in hair color. And they have also found that some gene control when MC1R is expressed or not.
The orange hair that is not just the result of an increasing gene, but from Complex interaction of at least eight gene.
In addition, researchers check Differences in almost 200 genes that are related to people with blond or dark hair.
there are A gradient of color that goes from black to dark brown, brown and blond light. That gradient is caused by an increasing number of variations in those 200 gene.
Many of them are astounded by scientists those genetic differences are not related to pigmentation, The but to the weave of the hair. And other variations determine how the hair grows, that is, one that's just or circular.
"Our work analyzes most of the genetic fluctuations that contribute to hair color differences"note Albert Tenesa, one of researchers Roslin Foundation o & n University of Edinburgh.
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