Sardonic Sistah Says

Observations… Ruminations… Ponderances… & Rants from Another Perspective

What Really Makes Your Eyes Blue?

with 5 comments

According to a team of Copenhagen researchers have tracked a genetic mutation which occured 6-10,000 years ago and is repsonsible for all the blue eyed people you see walking around today. 

“Originally, we all had brown eyes”, Professor Eiberg from the Department of Cellular and Molecular Medicine told Science Daily. “But a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a “switch”, which literally “turned off” the ability to produce brown eyes”.

The researchers studied the mitochondrial DNA in countries diverse as Turkey, Denmark and Jordan.  

Brown and green eyes can be explained by the amount of melanin in the iris but blue eyes doesn’t have the same variation of melanin. 

Professor Eiberg says that blue eyes doesn’t represent a positive or negative mutation but just one of the changes that humans have developed over the years such as hair color.

“It simply shows that nature is constantly shuffling the human genome, creating a genetic cocktail of human chromosomes and trying out different changes as it does so,” he said.


Written by rentec

1 February, 2008 at 8:37 pm

Posted in diversity

Tagged with , , ,

5 Responses

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  1. Actually, there is an advantage to brown eyes if living in a climate/country with a lot of sun. Brown eyes are better protected from developing conditions such as macular degeneration. Sunglasses protect everyone’s eyes, but are even more important for blue-eyed people living in places like I am, on the edge of the Sahara.

    Madame Monet
    Writing, Painting, Music, and Wine


    11 May, 2008 at 1:02 pm

  2. Looks like that kid caught one of his parent’s recessive genes.


    14 September, 2008 at 7:23 pm

  3. In my life time, family wise, my grandfather and one aunts on my dad’s side of the family had blue eyes. There were others in the family before my time I’d heard about. Our ancestors, according to my dad were the aboriginal people from the land down under. Don’t know if that has anything to do with it, but u never know.


    1 February, 2009 at 7:45 pm

  4. my girlfriend have green eyes and that is the thing that i always love about her facial features`’~

    Money Business :

    28 October, 2010 at 7:58 am

  5. I wonder then of the myth ‘Blue eyes of a poet’.Is it really associated with the poets this blue thing?


    21 November, 2011 at 8:18 am

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