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Where Did Blue Eyes Com from?

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Where did blue eyes com from?

Blue eyes is the result evolution. Darwin thought us that mutations that result in a big change in our phenotype is either a benefit for the population and therefore the trait is passed on to offsprings or the mutation has a negative effect on the population and that is a lethal factor. Their is also a third effect of mutation where it is neither positive or negative. Eye colors will fall into that last category as well as mutation like, hair color, baldness, freckles and beauty spots which neither increases nor reduces a human’s chance of survival. It is only the result of nature that is shuffling the human genome, creating a genetic cocktail of human chromosomes and trying out different changes.
Because of the humongous amount of information that our DNA carries, scientist were able to identify that people with blue eyes share the exact same DNA difference that causes their blue eyes. This mutation can be retrace about 6,000 to 10,000 years ago in Europe. This is why we can find that mostly Europeans will have blue eyes. This is due to common ancestors.
Professor Hans Eiberg from the Department of cellular and Molecular Medicine said that « Originally, we all had brown eyes ». Approximatively 16 genes will be responsible for eye color in humans; however their is two main genes that are associated with eye color mutation and both of them are localized in Chromosome 15.Those genes also called P protein are involved in the production of melanin. Melanin is a biological pigment that is responsible for the color of our eyes, hairs and skin. By turning off part of that gene, less melanin is produce in the iris effectively diluting brown eyes to blue. The fact of having no production of melanin will result in having no pigmentation in the hairs, skin and the iris will have a red color. This condition is known as albinism.

Even though having blue eyes does not contribute to a distinct advantage of surviving, we could compare having blue eyes to the tail of a peacock. The peacock uses his beautiful feather to charm the female so he could mate. Blue eyes in our society is consider sexy and therefore increases the chances to mate and reproduce. Blue eye are part of sexual selection it gives the female an other criteria to base her will to reproduce. This genetic mutation doesn't affect the health or life style of the person but allow this person to see his difference as a reproductive advantage. I can then confirm that this trait is definitively effective since we do know that most blue-eyed Europeans share a common ancestor from a few thousand years ago. This is a prove of its efficiency.…...

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