The beard returns to fashion in recent years. It’s something that was not expected and still has a little more loyal followers. At the same time nothing more simple: just like the vegetable gardens, to maintain, to let grow (no need for fertilizer and more), to cut …
Science explains it: it is in fact the gene MC1R, the one that codes the characteristic “color” of the hair, which can be brought to convey “incomplete dominant hereditary traits”.
This has everything to do with the genes that code the pigment rate: melanin. The color of the hair depends very strongly on two of these pigments: eumelanin, the black pigment, and pheomelanin, the red pigment.
More than ten years ago, researchers discovered that the MC1R gene acts in a very pronounced way on chromosome 16. It is he who, by this “action”, gives this hair red color.
When someone inherits two mutated versions of the MC1R gene (from each parent), there is less pheomelanin converted to eumelanin. This first, pheomelanin, accumulates in the pigment cells. People in this case will end up with fair skin and red hair.
So … if over five or six generations in your family, there has never been the appearance of a red hair on the horizon, do not think that you are the fruit of an extramarital relationship! Genetics can explain many things and here, it is categorical in the field of Barbes-Rousses.