Scientists have found that replacing of the DNA’s four letter is the key to genome shift a particular gene’s activity and that leads it to fairer in hair color. Over the time past six years studies of genetic variation in thousands of people have linked atleast eight DNA regions that heightened basis of the blondness in people’s hair. Some of the base changes in the DNA letter or single nucleotides were in genes that involve in the production of pigment in someone’s skin and hair.The changes in the regulatory DNA could result in hair color not skin color change because regulatory DNA can change gene activity just in certain parts of the body that is why if your hair changes color your skin will not and vice versa. The article goes on say how in Northern Europeans the KITLG a single nucleotide polymorphism was i strongly linked to blondness because it codes for a protein of specialized for it . The single nucleotide polymorphism had caught the eye of geneticist David Kingsley and he found this applies to fish, mice as it does to humans. There is a switch that regulates the of KITLG which easier to predict red and black color accurately based on the hair color related SNPS but it is harder to the blonde and brunettes. I liked reading this article because I learned that the genetic cause and how the evolution occurred. The KITLG is active in many places in the body and now I know why many people have blonde hair instead of another hair color and how the effect of KITLG is specific to hair and not skin or eye color which is quite unique an fascinating compared the most pigmentation genes today which is what I had not expected at all before.