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Each person has a pair of hair genes and the pair determines what color their hair will be.
Is blonde hair and blue eyes a recessive trait. 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. Blond hair and blue eyes are the result of having less brown pigment melanin. 1 2014 1 15 pm for all those brunettes wishing they were naturally blond a small genetic change could have made all the difference.
The colour of our eyes depends on how much melanin is present in the iris. Naturally most genetic differences between populations are not as superficial as eye and hair color and i m not aware that there are more recessive european specific alleles than you d expect by chance. Say b is the gene for brown hair dominant and b is the gene for blond hair recessive.
Some genes that reduce melanin overall cause people to have blond hair and 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. But you asked about blue eyes specifically not just light colored ones.
If your melanocytes produce a lot of melanin you re likely to have darker skin hair and eyes. As mentioned above blue eye colour is determined by something called melanin. In northern regions of europe evolution seems to have favored blond hair and bl.
Bb brown hair bb brown hair because b dominates bb brown hair because b dominates bb blond. Melanin is a brown pigment that controls the colour of our skin eyes and hair. Although hair color is dependant on dominant and recessive qualities predicting hair color is more complex than predicting other genetic traits.
Besides the brains that a blonde girl has this study also debunks other stereotypes which are often targeted towards blondes. For example all blondes have blue eyes. A gene for brown hair will override a gene for blond hair and a gene for brown eyes will override a gene for blue eyes.
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