Blue Eyes Genetic Mutation: History and Limitation – Recent research shows that humans who have blue eyes have one ancestor. A team from the University of Copenhagen has tracked the blue eyes genetic mutation that occurred 6 – 10,000 years ago and found the cause of the color of the blue eyes of all humans living on this planet today.
From it came the genetic mutation that resulted in 200 million pairs of blue eyes.
But, for the total size of the world population, the number is very small. The number of blue eyes is less than brown eyes or black eyes.
In the UK, the blue-eyed population reaches 45%.
No wonder if blue eyes are considered more attractive, charming, and attractive. Iris Blue is the strongest and most beautiful color in a rainbow.
The famous blue-eyed men and women are more charming. Each time a man approaches a blue-eyed woman, his feelings are immediately guessed. Seen from the enlargement of the pupil eye that reflects the feeling of the woman. Whether the blue-eyed woman is attracted or not, it will look.
Blue Eyes Genetic Mutation History
“Initially, we all have brown eyes. But a genetic mutation affects the OCA2 gene in our chromosome, resulting in a change that literally turns off the ability to produce brown eyes, “said Professor Hans Eiberg of the Department of Cellular and Molecular medicine.
The OCA2 gene code is called P protein, which is involved in the production of melanin, the pigment that gives color to the hair, eyes and skin. The changes lie in the genes adjacent to OCA2, however, do not turn off the genes entirely, but rather limit the action to reduce the production of melanin in slices.
Mutations are found in completely different genes called HERC2. Then, HERC2 changed OCA2, meaning it turns brown and changed to blue. Every blue-eyed person has the exact same mutation.
How can this mutation begin? It is possible when humans migrate from Africa to Europe. This will explain why only people of European descent have blue eyes. It would also say that all blue-eyed people share one single European ancestor.
For many years, scientists searching for the origins of blue eyes on the OCA2 gene, but their efforts have not produced any results. Finally, the researchers found the bright spot by assuming that HERC2 as the cause of blue eyes. This change successfully submerged the OCA2 gene. At first the brown OCA2 gene can be traced to its African circulation. From here they immigrated to Europe, until mutated into a blue-eyed gene.
The effect of the change on OCA2 is very specific, if the OCA2 gene has been completely destroyed or turned off, humans will live without melanin in their hair, eyes or skin tone, a condition known as albinism.
Every human being with blue eyes always has the same mutation. This became a strong proof even though the early mutant identity was still a mystery. Evidence of the existence of blue-eyed humans can be found in Spain on a skeleton which is 7000 years old.
Limited genetic variation
The variation in eye color, from brown to green can all be explained by the amount of melanin in the iris, but the blue-eyed individual only has a small degree of variation in the amount of melanin in their eyes.
Nature Randomizes Our Genes
Mutation of brown to blue eyes may be representative of both positive and negative mutations.
It is one of several mutations such as hair color, baldness, and freckles, which does not increase or reduce the chances of humans to survive.
As Professor Eiberg says, that it simply shows that nature continues to randomize the human genome, creating a genetic human chromosome, and trying different changes.
Thank you very much for reading Blue Eyes Genetic Mutation: History and Limitation, hopefully useful.