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OUT OF MIND » CHANGING ENVIRONMENT & NATURE » SCIENCE & TECHNOLOGY » How Blue eyes Originated

How Blue eyes Originated

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1How Blue eyes Originated		 Empty How Blue eyes Originated Thu May 02, 2013 9:56 pm

PurpleSkyz

PurpleSkyz
Admin


How Blue eyes Originated






How Blue eyes Originated		 Picmonkey-collage

Everyone with blue eyes alive today – from Angelina Jolie to Wayne Rooney – can trace their ancestry back to one person who probably lived about 10,000 years ago in the [url=http://maps.google.com/maps?ll=41.0,36.0&spn=1.0,1.0&q=41.0,36.0 (Black Sea Region)&t=h]Black Sea region[/url], a study has found. Scientists studying the genetics of eye colour have discovered that more than 99.5 per cent of blue-eyed people who volunteered to have their DNA analysed have the same tiny mutation in the gene that determines the colour of the iris.




This indicates that the mutation originated in just one person who
became the ancestor of all subsequent people in the world with blue
eyes, according to a study by Professor Hans Eiberg and colleagues at the [url=http://maps.google.com/maps?ll=55.6797222222,12.5725&spn=0.01,0.01&q=55.6797222222,12.5725 (University of Copenhagen)&t=h]University of Copenhagen[/url].

The scientists are not sure when the mutation occurred but other
evidence suggested it probably arose about 10,000 years ago when there
was a rapid expansion of the human population in Europe as a result of the spread of agriculture from the Middle East.

“The mutations responsible for blue eye colour most likely originate
from the north-west part of the Black Sea region, where the great
agricultural migration of the northern part of Europe took place in the
Neolithic periods about 6,000 to 10,000 years ago,” the researchers
report in the journal Human Genetics.

Professor Eiberg said that brown is the “default” colour for human
eyes which results from a build-up of the dark skin pigment, melanin.
However, in northern Europe a mutation arose in a gene known as OCA2
that disrupted melanin production in the iris and caused the eye colour
to become blue.

“Originally, we all had brown eyes,” said Professor Eiberg. “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.”

Variations in the colour of people’s eyes can be explained by the
amount of melanin in the iris, but blue-eyed individuals only have a
small degree of variation in the amount of melanin in their eyes, he
said.

“From this we can conclude that all blue-eyed individuals are linked
to the same ancestor. They have all inherited the same switch at exactly
the same spot in their DNA,” said Professor Eiberg.

Men and women with blue eyes have almost exactly the same genetic
sequence in the part of the DNA responsible for eye colour. However,
brown-eyed people, by contrast, have a considerable amount of individual
variation in that area of DNA.

Professor Eiberg said he has analysed the DNA of about 800 people
with blue eyes, ranging from fair-skinned, blond-haired Scandinavians to
dark-skinned, blue-eyed people living in Turkey and Jordan.

“All of them, apart from possibly one exception, had exactly the same
DNA sequence in the region of the OCA2 gene. This to me indicates very
strongly that there must have been a single, common ancestor of all
these people,” he said.

It is not known why blue eyes spread among the population of northern
Europe and southern Russia. Explanations include the suggestions that
the blue eye colour either offered some advantage in the long hours of
daylight in the summer, or short hours of daylight in winter, or that
the trait was deemed attractive and therefore advantageous in terms of
sexual selection.

Source The Independent



Thanks to: http://aworldchaos.wordpress.com



  

2How Blue eyes Originated		 Empty Re: How Blue eyes Originated Thu May 02, 2013 10:37 pm

Herb Lady

Herb Lady

ok, well, I'm just not so sure how to take this one.



Take care of the land and the animals and they will take care of you!

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3How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 12:52 am

AJAnderson

AJAnderson

ok, so explain why my eye color goes from hazel to blue and back to hazel? I have pin point when it happens, but not why.



Last edited by AJAnderson on Fri May 03, 2013 12:42 pm; edited 1 time in total

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4How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 12:56 am

PurpleSkyz

PurpleSkyz
Admin

Hazel eyes that change are a common trait in RH-'s AJ.

I also have eyes that change . I always used my eyes as an accessory when I was more into that thing.

HL... interesting isn't it to think that all that have blue eyes are related?



  

5How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 12:35 pm

topspin2



Purps.......Blue eyes here...and you probably knew, that do change to green...Its easy....just wear green...Poof....green eyes....I always see green, everybody else sees blue.......Hmmm to that....Must be my Moorish background....

6How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 12:48 pm

AJAnderson

AJAnderson

I have found that when I am in love my eyes are blue, but as the romance period begins to slow my eyes trun back to hazel and I know the romance period needs to begin again or it leads to a disrtuctive relationship. That is my indicator.

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7How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 1:15 pm

Herb Lady

Herb Lady

Wow AJ that is interesting.

Purps - what's bugging me about this is the fact that there are so many out there with blonde hair and blue eyes. It's a proven fact that blondes don't get credited for their intelligence, they are looked upon as being dumb easy pieces of ***. You let a blonde dye her hair brown and she automatically gets more respect, at the same time, let a brunette dye her hair blonde and she no longer gets that respect - she gets propositioned. And the blue eyes into the mix and now people with tend to be swayed to think that the blondes with blue eyes are now mutated easy pieces of ***, or are that way because of this mutation. I can assure all of you that although I am blonde with blue eyes that I am neither mutated nor easy! And I refuse to dye my hair to gain respect. I have plenty of respect for myself and my intelligence even if others don't.



Take care of the land and the animals and they will take care of you!

Come visit my site at:  https://onlynaturesmagic.com/

8How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 1:49 pm

PurpleSkyz

PurpleSkyz
Admin

But interestingly men with blond hair and blue eyes are adonis'!

My twins are blond haired and blue eyed. I don't think they think of themselves as pieces of azz at all. It is a shame that anyone thinks like that.

To bad the science community spends their time and monies on this and not how to correct the harm that vaccines have done to children. sigh....

Sofia Vargara (sp?) also was a blond that dyed her hair dark and then her career took off. So weird! And Anna Nicole and Marilyn were brunettes and did better as blonds! But were they respected... no



  

9How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 2:14 pm

Herb Lady

Herb Lady

And where is Marilynn now??



Take care of the land and the animals and they will take care of you!

Come visit my site at:  https://onlynaturesmagic.com/

10How Blue eyes Originated		 Empty Re: How Blue eyes Originated Fri May 03, 2013 2:43 pm

PurpleSkyz

PurpleSkyz
Admin

Yep... dead as is Anna Nicole.

It is a shame that any woman feels she has to change her hair color to succeed!



  

11How Blue eyes Originated		 Empty Re: How Blue eyes Originated Sat May 04, 2013 5:44 pm

NanneeRose

NanneeRose
Admin
Admin

Well at the end of the day it's up to the parents to teach their daughters that looks are not important in life to succeed that they can be whatever they want to be without having to look in the mirror! Beauty comes from within and it matters not what anyone else thinks! Now that's probably why your daughters don't think of themselves as a stereo type purps!



It's the simple things, small every day deeds of ordinary folk that keep the darkness at bay. Small acts of kindness and love.......~Gandalf~

12How Blue eyes Originated		 Empty Re: How Blue eyes Originated Sun May 05, 2013 1:11 pm

topspin2



Dang AJ....I like the way you operate.....When there green, there gone, time for a new one. Hmmmmmm....Might have saved me a bit of pain in my past......

13How Blue eyes Originated		 Empty Re: How Blue eyes Originated Sun May 05, 2013 2:02 pm

Herb Lady

Herb Lady

Yes Nannee, my momma taught that as well, but it's a shame not every momma taught that to their children.



Take care of the land and the animals and they will take care of you!

Come visit my site at:  https://onlynaturesmagic.com/

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