Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Blue-eyed humans have a single, common ancestor
University of Copenhagen ^ | January 30, 2008 | Unknown

Posted on 01/30/2008 2:10:37 PM PST by decimon

New research shows that people with blue eyes have a single, common ancestor. A team at the University of Copenhagen have tracked down a genetic mutation which took place 6-10,000 years ago and is the cause of the eye colour of all blue-eyed humans alive on the planet today. What is the genetic mutation

“Originally, we all had brown eyes”, said Professor Eiberg from the Department of Cellular and Molecular Medicine. “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 OCA2 gene codes for the so-called P protein, which is involved in the production of melanin, the pigment that gives colour to our hair, eyes and skin. The “switch”, which is located in the gene adjacent to OCA2 does not, however, turn off the gene entirely, but rather limits its action to reducing the production of melanin in the iris – effectively “diluting” brown eyes to blue. The switch’s effect on OCA2 is very specific therefore. If the OCA2 gene had been completely destroyed or turned off, human beings would be without melanin in their hair, eyes or skin colour – a condition known as albinism. Limited genetic variation

Variation in the colour of the eyes from brown to green can all 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. “From this we can conclude that all blue-eyed individuals are linked to the same ancestor,” says Professor Eiberg. “They have all inherited the same switch at exactly the same spot in their DNA.” Brown-eyed individuals, by contrast, have considerable individual variation in the area of their DNA that controls melanin production.

Professor Eiberg and his team examined mitochondrial DNA and compared the eye colour of blue-eyed individuals in countries as diverse as Jordan, Denmark and Turkey. His findings are the latest in a decade of genetic research, which began in 1996, when Professor Eiberg first implicated the OCA2 gene as being responsible for eye colour. Nature shuffles our genes

The mutation of brown eyes to blue represents neither a positive nor a negative mutation. It is one of several mutations such as hair colour, baldness, freckles and beauty spots, which neither increases nor reduces a human’s chance of survival. As Professor Eiberg says, “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.”


TOPICS: Culture/Society; Miscellaneous; News/Current Events; Technical
KEYWORDS: blueeyes; eugenics; evolution; genetic; genetics; godsgravesglyphs; helixmakemineadouble; incest
Navigation: use the links below to view more comments.
first 1-5051-100101-150151-200 ... 251-298 next last
Blue-eyed humans have a single, common ancestor

And a busy boy was he.

1 posted on 01/30/2008 2:10:39 PM PST by decimon
[ Post Reply | Private Reply | View Replies]

To: decimon

Wait...so if two blue eyed people get it on...it’s incest?


2 posted on 01/30/2008 2:12:18 PM PST by RockinRight ("Mike Huckabee appeals to the type of person who thinks pro-wrestling is real." - TQC)
[ Post Reply | Private Reply | To 1 | View Replies]

To: decimon

(singing)
...and don’t it make my brown eyes
don’t it make my brown eyes, blue.


3 posted on 01/30/2008 2:14:13 PM PST by Bishop_Malachi (Liberal Socialism - A philosophy which advocates spreading a low standard of living equally.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: decimon

I’ll play along. I have blue eyes. My parents have brown eyes. Is my father my father? /lol


4 posted on 01/30/2008 2:15:27 PM PST by GQuagmire (Giggety,Giggety,Giggety)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv; blam

Ping bleu


5 posted on 01/30/2008 2:16:42 PM PST by decimon
[ Post Reply | Private Reply | To 1 | View Replies]

To: GQuagmire

Both your parents carried a recessive gene for blue eyes. They had a four in one chance of any child having blue eyes.


6 posted on 01/30/2008 2:16:58 PM PST by Sherman Logan
[ Post Reply | Private Reply | To 4 | View Replies]

To: decimon
Don't It Make My Brown Eyes Blue

I knew there was a song about this! This scientest is way behind Crystal Gayle!

Damn I am a mutant!

7 posted on 01/30/2008 2:17:06 PM PST by Red_Devil 232 (VietVet - USMC All Ready On The Right? All Ready On The Left? All Ready On The Firing Line!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: GQuagmire
I’ll play along. I have blue eyes. My parents have brown eyes. Is my father my father?

Uhhhh....

8 posted on 01/30/2008 2:17:56 PM PST by decimon
[ Post Reply | Private Reply | To 4 | View Replies]

To: decimon

Here’s your sign.


9 posted on 01/30/2008 2:18:36 PM PST by Blogger (Propheteuon.com)
[ Post Reply | Private Reply | To 8 | View Replies]

To: decimon

Interesting. My husband and I have blue eyes.


10 posted on 01/30/2008 2:18:50 PM PST by trisham (Zen is not easy. It takes effort to attain nothingness. And then what do you have? Bupkis.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Sherman Logan

You are correct. Actually I got my paternal grandmother’s eyes.


11 posted on 01/30/2008 2:19:09 PM PST by GQuagmire (Giggety,Giggety,Giggety)
[ Post Reply | Private Reply | To 6 | View Replies]

To: GQuagmire

Now if both your parents had blue eyes and you had brown eyes, the answer would be no.


12 posted on 01/30/2008 2:19:21 PM PST by Kozak (Anti Shahada: There is no god named Allah, and Muhammed is a false prophet)
[ Post Reply | Private Reply | To 4 | View Replies]

To: decimon

Parthenogenesis?


13 posted on 01/30/2008 2:20:06 PM PST by Texas Songwriter
[ Post Reply | Private Reply | To 1 | View Replies]

To: GQuagmire
You are correct. Actually I got my paternal grandmother’s eyes.

Doesn't she miss them?
14 posted on 01/30/2008 2:20:20 PM PST by Kozak (Anti Shahada: There is no god named Allah, and Muhammed is a false prophet)
[ Post Reply | Private Reply | To 11 | View Replies]

To: decimon

DNA tests?

/lol


15 posted on 01/30/2008 2:20:28 PM PST by GQuagmire (Giggety,Giggety,Giggety)
[ Post Reply | Private Reply | To 8 | View Replies]

To: Sherman Logan
Both your parents carried a recessive gene for blue eyes. They had a four in one chance of any child having blue eyes.

So I have blue eyes and my wife has brown eyes. Her mother had blue eyes, her father brown.

I tell her that our future children are going to have brown eyes. That's not quite right, is it?

16 posted on 01/30/2008 2:20:38 PM PST by Drew68
[ Post Reply | Private Reply | To 6 | View Replies]

To: trisham

uh oh... ; )


17 posted on 01/30/2008 2:20:58 PM PST by xsmommy
[ Post Reply | Private Reply | To 10 | View Replies]

To: decimon
Photobucket
18 posted on 01/30/2008 2:21:10 PM PST by rfp1234 (Phodopus campbelli: household ruler since July 2007.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Kozak

LOL


19 posted on 01/30/2008 2:21:11 PM PST by GQuagmire (Giggety,Giggety,Giggety)
[ Post Reply | Private Reply | To 14 | View Replies]

To: decimon

There were eight people on the ark, Noah, his wife, the three sons and their wives.

I guess one of them was blue-eyed. At least the time line (6 to 10,000 years ago) is correct.

fishtank, Ph.D.


20 posted on 01/30/2008 2:21:20 PM PST by fishtank (Fenced BORDERS, English LANGUAGE, Patriotic CULTURE: A good plan.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: decimon

Hubby has brown eyes, and I have green eyes. We have three blue-eyed children. (out of nine) Do they have different ancestors than we do??????????


21 posted on 01/30/2008 2:22:06 PM PST by petitfour
[ Post Reply | Private Reply | To 1 | View Replies]

To: Texas Songwriter
Parthenogenesis?

No, I'm straight.

22 posted on 01/30/2008 2:22:28 PM PST by decimon
[ Post Reply | Private Reply | To 13 | View Replies]

To: rfp1234

23 posted on 01/30/2008 2:23:08 PM PST by fishtank (Fenced BORDERS, English LANGUAGE, Patriotic CULTURE: A good plan.)
[ Post Reply | Private Reply | To 18 | View Replies]

To: Drew68

Odds are 50% of your kids will have blue, 50% brown (or hazel).


24 posted on 01/30/2008 2:23:14 PM PST by TheThirdRuffian (Don't blame me; I will write in Thompson.)
[ Post Reply | Private Reply | To 16 | View Replies]

To: Drew68

The odds are half of your kids will have brown eyes, since your wife carries one Brown and one Blue, and you have two blues. The brown will express if present.


25 posted on 01/30/2008 2:23:26 PM PST by MrB (You can't reason people out of a position that they didn't use reason to get into in the first place)
[ Post Reply | Private Reply | To 16 | View Replies]

To: RockinRight

I saw a billboard for Lucy’s bones on exhibit at a local museum.

She’s my ancestor (although I haven’t had a paternity test yet).

I want them back. Mine mine mine. Or I’ll settle for half the receipts.


26 posted on 01/30/2008 2:23:31 PM PST by weegee (Those who surrender personal liberty to lower global temperatures will receive neither.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: decimon

I have bright blue eyes as do all the members of my immediate family. My yDNA is R1b and my mtDNA is ‘V.’


27 posted on 01/30/2008 2:24:02 PM PST by blam (Secure the border and enforce the law)
[ Post Reply | Private Reply | To 1 | View Replies]

To: GQuagmire
DNA tests?

That would make for a new Book of Revelations.

28 posted on 01/30/2008 2:24:20 PM PST by decimon
[ Post Reply | Private Reply | To 15 | View Replies]

To: Drew68

You may carry a recessive gene for blue eyes. Your wife presumably does.

If you both have the gene, you have the one in four chance of a blue-eyed kid.

If she carries the gene and you don’t, your kids will all have brown eyes.

But don’t quote me, not exactly my area of expertise.


29 posted on 01/30/2008 2:25:33 PM PST by Sherman Logan
[ Post Reply | Private Reply | To 16 | View Replies]

To: Kozak
Just don't use it for marbles...


30 posted on 01/30/2008 2:25:36 PM PST by weegee (Those who surrender personal liberty to lower global temperatures will receive neither.)
[ Post Reply | Private Reply | To 14 | View Replies]

To: rfp1234

Throw in a picture of Wayne Gretzky and you may have something there.


31 posted on 01/30/2008 2:25:54 PM PST by rintense (You don't advance conservatism by becoming more liberal. Piss off McCain and Huck!)
[ Post Reply | Private Reply | To 18 | View Replies]

To: decimon
Blue-eyed humans have a single, common ancestor

Photobucket

32 posted on 01/30/2008 2:25:56 PM PST by rfp1234 (Phodopus campbelli: household ruler since July 2007.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: blam
I have bright blue eyes as do all the members of my immediate family. My yDNA is R1b and my mtDNA is ‘V.’

And all because of "Olaf the Hound" some thousands of years ago.

33 posted on 01/30/2008 2:26:00 PM PST by decimon
[ Post Reply | Private Reply | To 27 | View Replies]

To: fishtank

Yum.


34 posted on 01/30/2008 2:26:21 PM PST by Hoffer Rand
[ Post Reply | Private Reply | To 23 | View Replies]

To: decimon

LOL!


35 posted on 01/30/2008 2:26:35 PM PST by trisham (Zen is not easy. It takes effort to attain nothingness. And then what do you have? Bupkis.)
[ Post Reply | Private Reply | To 22 | View Replies]

To: fishtank

Asuming the “world” described in that account is not “merely” mesopotamia (the entire known world at the time and the cradle of civilization where a devestating Texas-size flood occurred during the correct timeframe), you would be correct.

(The term “world” is used kind of loosely in the O.T. — there are times when various kings during the Egyptian periods are “kings of the whole world, that sort of thing.)

An unknowable debate, as it detracts from the point of the story.


36 posted on 01/30/2008 2:27:15 PM PST by TheThirdRuffian (Don't blame me; I will write in Thompson.)
[ Post Reply | Private Reply | To 20 | View Replies]

To: trisham
British twins separated at birth married without knowing of kinship ?
37 posted on 01/30/2008 2:27:36 PM PST by weegee (Those who surrender personal liberty to lower global temperatures will receive neither.)
[ Post Reply | Private Reply | To 10 | View Replies]

To: decimon
Scientists Find A DNA Change That Accounts For White Skin
38 posted on 01/30/2008 2:27:45 PM PST by blam (Secure the border and enforce the law)
[ Post Reply | Private Reply | To 33 | View Replies]

To: decimon
Photobucket

This is not good news.

Goebbels wrote about his first meeting with Hitler: "I was fascinated by Hitlers blue eyes". Traudl Junge, his last secretary (see the movie: "Der Untergang") often told in interviews, that people were amazed about Hitlers blue eyes.

39 posted on 01/30/2008 2:28:03 PM PST by vortigern (Defeat the RINOs: Bennett (R-UT), Craig (R-ID), Graham (R-SC), Gregg (R-NH), Hagel (R-NE), Kyl (R-AZ)
[ Post Reply | Private Reply | To 1 | View Replies]

To: decimon; SunkenCiv; blam

The blue-eyed mutation was common in the northeastern provinces of Atlantis. When the sea level rose in 8992 BC (only dorks think Atlantis sank), the blue-eyed residents of NE Atlantis naturally sailed on the prevailing winds to Europe.


40 posted on 01/30/2008 2:28:40 PM PST by CholeraJoe ("A dead whale or a stove boat!")
[ Post Reply | Private Reply | To 1 | View Replies]

To: vortigern

Huh, I thought he had brown eyes.


41 posted on 01/30/2008 2:29:04 PM PST by TheThirdRuffian (Don't blame me; I will write in Thompson.)
[ Post Reply | Private Reply | To 39 | View Replies]

To: Drew68

Sorry, obviously got that mixed up. You presumably carry two copies of the blue gene. Your wife presumably carries one. As others have said, you have 50/50 chance of blue/brown eyed kids.


42 posted on 01/30/2008 2:29:48 PM PST by Sherman Logan
[ Post Reply | Private Reply | To 16 | View Replies]

To: decimon

Adam and Eve’s mailman had blue eyes?


43 posted on 01/30/2008 2:30:07 PM PST by Larry Lucido
[ Post Reply | Private Reply | To 1 | View Replies]

To: Sherman Logan
"Both your parents carried a recessive gene for blue eyes. They had a four in one chance of any child having blue eyes."

Interesting. Both my parents have brown eyes as do my siblings yet I have blue eyes and I am the 4th child. The 5th child got brown eyes.

44 posted on 01/30/2008 2:30:16 PM PST by avacado
[ Post Reply | Private Reply | To 6 | View Replies]

To: petitfour

Someone figure the math out for me also on this.... We have six children, husband and I both have green eyes, 5 children have blue and one brown. Why did we not get one green eyed? Are they all mine!?? LOL


45 posted on 01/30/2008 2:30:23 PM PST by TriGirl (Lurking for 7 years!!!!!)
[ Post Reply | Private Reply | To 21 | View Replies]

To: GQuagmire

LOL...!!

My Dad had brown eyes, Mom had blue eyes...

both brothers were blond hair and blue eyes!!

me...redhead with green eyes....


46 posted on 01/30/2008 2:30:28 PM PST by EBH ( J. Galt for President)
[ Post Reply | Private Reply | To 4 | View Replies]

To: RockinRight

“Wait...so if two blue eyed people get it on...it’s incest?”

I don’t think it counts after 2nd cousin.


47 posted on 01/30/2008 2:30:54 PM PST by bk1000 (A clear conscience is a sure sign of a poor memory)
[ Post Reply | Private Reply | To 2 | View Replies]

To: decimon

Adam.

No news here.


48 posted on 01/30/2008 2:31:12 PM PST by RobRoy
[ Post Reply | Private Reply | To 1 | View Replies]

To: Sherman Logan; GQuagmire
Both your parents carried a recessive gene for blue eyes. They had a four in one chance of any child having blue eyes.

...Or 75% chance of being the Mailman's kid.

49 posted on 01/30/2008 2:31:42 PM PST by Dead Dog (Classic Liberalism..AT ALL COSTS)
[ Post Reply | Private Reply | To 6 | View Replies]

To: Bishop_Malachi

Blue on blue, heartache on heartache
Blue on blue now that we are through
Blue on blue, heartache on heartache
And I find I can’t get over losing you


50 posted on 01/30/2008 2:32:38 PM PST by savedbygrace (SECURE THE BORDERS FIRST (I'M YELLING ON PURPOSE))
[ Post Reply | Private Reply | To 3 | View Replies]


Navigation: use the links below to view more comments.
first 1-5051-100101-150151-200 ... 251-298 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson