Blonde Hair Vs Brown Hair Genetics

According to these genetic rules the color of the hair is the result of the combination of two pairs of genes coming from each of the two parents.

Blonde hair vs brown hair genetics. The genetic mutation that led to blondism occurred about 11 000 years ago around the last ice age. Brown hair is dominant over blonde hair. The blond gene was detailed june 1 in the journal nature genetics.

As one might expect low concentrations of the eumelanin pigment will yield blonde hair while high concentrations result in darker brown hair. Only those with two blonde haired alleles will have blonde hair. Depending on how these genes combine the color of the hair will be different.

Some people have variations in one copy of the mc1r gene in each cell that causes the gene to be turned off deactivated. My mother was born with blond hair which slowly turned brown by her 30s. Children with one brown haired allele and one blonde haired allele will present brown hair as well.

But modern humans emigrating from africa reached europe only 35 000 40 000 years ago. Now let s take a look at how we can use genetics to guess your baby s. It is estimated that more than 90 percent of people in the world have brown or black hair.

Aboriginal australians also have often have natural blond to brown hair with as many as 90 of children born blond in some areas. Blue as well as blonde hair vs. This project was supported by the department of genetics stanford school of medicine.

I was born with dark brown hair which turned blond by the time i was 2. I have blonde hair and brown. Here the researchers also discovered that the region that contains oca2 is involved in determining blonde vs.