Recessive Genes Blonde Hair Blue Eyes

Well blond hair and blue eyes are caused by the absence of a pigment so it s not at all surprising that allele coding for the presence of one is dominant.

Recessive genes blonde hair blue eyes. Rather than one or the other hair color is additive meaning the pigment melanin along with a variety of genes determines how dark your hair will be. Although hair color is dependant on dominant and recessive qualities predicting hair color is more complex than predicting other genetic traits. Rare hair and eye color combinations.

Statistically two unaffected carriers of the gene can expect a 25 percent chance of having a child who is phenylketonuric a 50. In 2002 bbc news reported that unnamed german experts had concluded that the natural distribution of blond hair would cease within the span of 200 years owing to the genes associated with blond hair being recessive the article reported the scientists had said that there is a reportedly low number of people carrying the recessive blond allele especially in nations of mixed. This is one reason why blue colour contact lenses are popular.

So a person with brown hair and brown eyes may carry genes for blond hair and blue eyes but a person with blue eyes and blond hair is not likely to carry genes for brown hair and brown eyes. Among human beings blue eyes are less common than brown eyes. This may explain why persons with phenylketonuria generally have blond hair blue eyes and fair skin.

Genetics plays a huge role in just how rare some of these combinations are. Yes a child inherits half their genes from mom and the other half from dad but their genome is actually a veritable soup of family genetics influenced by all the generations that came before. Phenylketonuria is transmitted by an autosomal recessive gene which is present in about 1 in every 60 people.

Is eye color determined by genetics. How scientists can figure out the eye and hair color of people living 1000s of years ago by looking at their dna. Blue eyes and blond hair are linked together.

Blond hair and blue eyes are the result of having less brown pigment melanin. Some genes that reduce melanin overall cause people to have blond hair and blue eyes. Genetics of eye color.