The Best Red And Blonde Hair Genetics References
The MC1R gene is located on the long arm of chromosome 16. Its official location is 16q24.3, and is 3,098 base pairs in length. Depending on the specific mutation (known as a polymorphism in the language of genetics), hair color will range from strawberry blond to auburn. The MC1R gene encodes a protein made up of 317 amino acids.
Red hair is the result of a genetic variant that causes the body’s skin cells and hair cells to produce more of one particular type of melanin and less of another. Most redheads have a gene.
Red hair (or ginger hair) occurs naturally in one to two percent of the human population, appearing with greater frequency (two to six percent) among people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein.
Nowadays, the frequency of red hair among Germanic people is highest in the Netherlands, Belgium, north-western Germany and Jutland, i.e. where the percentage of R1b is the highest, and presumably the first region to be settled by R1b, before blending with the blond-haired R1a and I1 people from Scandinavia and re-expanding south to Germany.
Blonde (or blond for men) hair ranges from nearly white (platinum blonde, tow-haired) to a dark golden blonde. Strawberry blonde, a mixture of blonde and red hair, is a much rarer type containing the most pheomelanin.  Blonde hair can have almost any proportion of pheomelanin and eumelanin, but has only small amounts of both.More pheomelanin creates a more golden or strawberry.
One to two percent of humans have red or orange hair. The allele for red hair is neither dominant nor recessive. Red hair is an incomplete dominant. When a baby receives an allele for red hair, it will blend with its accompanying allele. A red-blonde genotype presents as strawberry blonde and a red-brown genotype presents as auburn.
As one might expect, low concentrations of the eumelanin pigment will yield blonde hair, while high concentrations result in darker brown hair. People with natural red hair have much higher pheomelanin levels in their hair than people with more common hair colors like brown, blonde, and black. To have a simpler understanding, here is a chart.
Red hair is caused by a mutation in what's known as the MC1R gene, Petra explained. If someone inherits two mutated versions of this gene, they end up as a typical redhead with fair skin.
Genetics Of Your Hair Color. Like for your hair texture, many genes work together to determine your hair color. They control the amount of pigment (melanin), its type (eumelanin for blond to black, or phenomelanin for red), its production, and its distribution (how close together the melanin granules are = how deep the color is).
Yes. Blond hair dominates red hair. Why? Because blond hair is actually a very thin layer of the brown/black pigment called eumelanin. This layer reflects as blond when combined with the protein that hair is made of. Red hair pigment is actual...
The Genetics of Blond Hair By Elizabeth Pennisi Jun. 1, 2014 , 1:15 PM For all those brunettes wishing they were naturally blond, a small genetic change could have made all the difference.