Tuesday , August 9 2022

The scientific explanation to solve the mystery of genetic & # 39; redheads



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S & # 39; now it was associated with the orange hair b & # 39; single gene, the MC1R.

The enigma of orange hair is much more complex than previously thought.

Until now it was believed that children born red and men needed to inherit two copies of & # 39; gene called MC1R, One from the mother and one from father.

The MC1R gene is recessive, ie, not manifesting itself in the presence of & # 39; dominant gene and only when the person receiving the maternal and paternal copies.

  • You redhead hidden?

However, not all people who inherit the gene MC1R have orange hair, so left suspettaw scientists that other factors played an important role.

S & # 39; Are these factors were a mystery … s & # 39; now.

A study by the University & # 39; Edinburgh in the UK has just demonstrated why the MC1R gene explains only part of the puzzle.

genetic differences

The study, developed by scientists at the University & # 39; Edinburgh, is the University & # 39; Edinburgh most genetic research conducted on small plans so far.

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It is estimated that about 13% of Scotland's population is ħarirha.

Other researchers in Scotland have tried in the past to explain the key to orange hair

About 1 to 2% of the world's population is fierce, but in Scotland the percentage is close to 13%, which is equivalent to 650,000 people, according to ScotlandsDNA project.

Scientists at the University & # 39; Edinburgh examined the DNA of & # 39; nearly 350,000 people who participated in the project called British UK Biobank, Which collects information on health and the genome of & # 39; more than 400,000 people in the UK.

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Red hair is the result of & # 39; the complex interaction of & # 39; at least eight genes.

When the researchers compared the genome of & # 39; & # 39 with redheads; that & # 39; people with brown or black hair, found eight differences relating to hair color.

And also found that some genes control when the MC1R is expressed or not.

The orange hair is not simply the result of & # 39; recessive gene, but & # 39; the complex interaction of & # 39; at least eight genes.

Blonde and brown

The researchers also found differences in almost 200 genes associated with & # 39; people with blond or dark hair.

There is a color gradient that goes from black to dark brown, light brown and blond. And that gradient is caused by a growing number of & # 39; & # 39 variants in; those 200 genes.

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The researchers also found differences in nearly 200 genes associated with & # 39; people with blond or dark hair.

Something that surprised scientists is that many of these genetic differences are not associated with & # 39; pigmentation, but with hair texture. And other variables determine how hair grows, ie, whether it dritiku or cabbage.

"Our work describes the majority of genetic variations that contribute to differences in hair color," he said. Albert Tenesa, One of the researchers & # 39; the Roslin Institute & # 39; University & # 39; Edinburgh.

Ian Jackson, Genetic expert in the same center, said that the work is an example of & # 39; "power of UK Biobank, a single genetic study of the UK allowed us to make these discoveries".

The study was published in the journal Nature Communications.

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