Results 1 to 10 of 10

Thread: Blue-Eyed Humans Have a Single, Common Ancestor

  1. #1
    Senior Member Volk und Rasse's Avatar
    Join Date
    Jan 2019
    Last Online
    1 Week Ago @ 07:37 AM
    Ethnicity
    Danish
    Country
    Denmark Denmark
    Gender
    Family
    Married
    Politics
    Völkisch
    Posts
    128
    Thanks Thanks Given 
    172
    Thanks Thanks Received 
    197
    Thanked in
    83 Posts

    Blue-Eyed Humans Have a Single, Common Ancestor

    Blue-eyed humans have a single, common ancestor




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


    What is the genetic mutation
    "Originally, we all had brown eyes," said Professor Hans 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."



    • Hans Eiberg, Jesper Troelsen, Mette Nielsen, Annemette Mikkelsen, Jonas Mengel-From, Klaus W. Kjaer, Lars Hansen. Blue eye color in humans may be caused by a perfectly associated founder mutation in a regulatory element located within the HERC2 gene inhibiting OCA2 expression. Human Genetics, 2008; 123 (2): 177 DOI: 10.1007/s00439-007-0460-x


    https://www.sciencedaily.com/release...0130170343.htm

  2. The Following 3 Users Say Thank You to Volk und Rasse For This Useful Post:


  3. #2
    Funding Member
    "Friend of Germanics"
    Skadi Funding Member


    Join Date
    Aug 2016
    Last Online
    @
    Ethnicity
    European American
    Ancestry
    United Kingdom, Czechoslovakia, Netherlands, Germany, France
    mtDNA
    H1c12
    Country
    United States United States
    State
    Florida Florida
    Gender
    Zodiac Sign
    Aries
    Politics
    Nationalist
    Religion
    Good Heathen
    Posts
    555
    Thanks Thanks Given 
    444
    Thanks Thanks Received 
    457
    Thanked in
    216 Posts
    I wonder where the first blue eyed person lived.

  4. #3
    Senior Member schwab's Avatar
    Join Date
    Nov 2018
    Last Online
    7 Minutes Ago @ 05:34 PM
    Ethnicity
    Alsatian
    Ancestry
    germanic/alsatian/Elsaesser
    Subrace
    Child of God
    Country
    United States United States
    State
    Oregon Oregon
    Location
    Rogue River
    Gender
    Family
    Married
    Occupation
    retired - Aerospace
    Politics
    independent
    Religion
    Born again Christian,
    Posts
    451
    Thanks Thanks Given 
    377
    Thanks Thanks Received 
    639
    Thanked in
    291 Posts
    How about the daughter of Michael Jackson with mesmerizing blue eyes?

    https://www.aol.com/article/entertai...lity/23644516/

    White mother, sperm donor unknown.............

  5. #4
    Senior Member Volk und Rasse's Avatar
    Join Date
    Jan 2019
    Last Online
    1 Week Ago @ 07:37 AM
    Ethnicity
    Danish
    Country
    Denmark Denmark
    Gender
    Family
    Married
    Politics
    Völkisch
    Posts
    128
    Thanks Thanks Given 
    172
    Thanks Thanks Received 
    197
    Thanked in
    83 Posts
    Quote Originally Posted by Elizabeth View Post
    I wonder where the first blue eyed person lived.
    Probably in the northwestern region of the Black Sea.

    And you have the highest percentage of people with blue eyes in the baltic regions and its surroundings, so I will associate the mutation to the european paleolithic.

  6. #5
    Senior Member Finnish Swede's Avatar
    Join Date
    Nov 2017
    Last Online
    7 Hours Ago @ 10:27 AM
    Ethnicity
    Finnish Swede
    Ancestry
    Father: Swedish, Mother Finnish Swede
    Subrace
    Sub-Nordid - Nordid - Baltid mix
    Country
    Other Other
    State
    Finland Swede Community Finland Swede Community
    Location
    Ostrobothnia
    Gender
    Age
    21
    Zodiac Sign
    Pisces
    Occupation
    Student
    Politics
    No specific ideology
    Religion
    Lutheran
    Posts
    1,086
    Thanks Thanks Given 
    220
    Thanks Thanks Received 
    1,785
    Thanked in
    990 Posts
    Quote Originally Posted by Volk und Rasse View Post
    Probably in the northwestern region of the Black Sea.

    And you have the highest percentage of people with blue eyes in the baltic regiones and its surroundings, so I will associate the mutation to the european paleolithic.

  7. The Following 3 Users Say Thank You to Finnish Swede For This Useful Post:


  8. #6
    a.k.a. Alpensun Ringenwald's Avatar
    Join Date
    Jun 2011
    Last Online
    1 Day Ago @ 08:41 PM
    Status
    Available
    Ethnicity
    Swiss
    Ancestry
    Switzerland
    Country
    Switzerland Switzerland
    Location
    The edge of the Germanic world
    Gender
    Age
    37
    Posts
    155
    Thanks Thanks Given 
    17
    Thanks Thanks Received 
    14
    Thanked in
    10 Posts

    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."

    I don't follow. How it became so predominant in a population if only a single common ancestor surrounded by a multitude of brown-eyed people had this mutation? How is this possible if "the mutation of brown eyes to blue represents neither a positive nor a negative mutation"? The decrease of melanin production must have been a very positive mutation instead, whatever the reason.

    From their article, they reach their conclusion by analysing "155 blue-eyed individuals from Denmark" as well as "5 and 2 blue-eyed individuals from Turkey and Jordan, respectively." ... I'm not a geneticist but it hardly seems a representative sampling.

    Anyway, so much missing pieces of the puzzle. I have the feeling that the truth lies far deeper in the past than we are told probably because we have actually no clue of the full picture passed a certain point in history. And this point is not that far. Most research are also carried on by hyperspecialists nowadays and it becomes hard for them to give conclusions that aren't valid only for their own particular field of research...

  9. The Following 2 Users Say Thank You to Ringenwald For This Useful Post:


  10. #7
    Senior Member Volk und Rasse's Avatar
    Join Date
    Jan 2019
    Last Online
    1 Week Ago @ 07:37 AM
    Ethnicity
    Danish
    Country
    Denmark Denmark
    Gender
    Family
    Married
    Politics
    Völkisch
    Posts
    128
    Thanks Thanks Given 
    172
    Thanks Thanks Received 
    197
    Thanked in
    83 Posts
    Quote Originally Posted by Ringenwald View Post
    I don't follow. How it became so predominant in a population if only a single common ancestor surrounded by a multitude of brown-eyed people had this mutation? How is this possible if "the mutation of brown eyes to blue represents neither a positive nor a negative mutation"? The decrease of melanin production must have been a very positive mutation instead, whatever the reason.
    Think that we were still in the paleolithic in Europe, so a mutation like this cuold have easily spread in small clans (and we are talking about millennia). The HG europeans were very few, like all HG groups in any period of human history and in any corner of the world

    A high percentage of the current population of the baltic region and nordic regions makes sense, because a migration across millenials with many founder effects seems plausible, especially with the retreat of glaciers at the end of the Ice Age, and the migration to northern latitudes from this northwestern region of the Black Sea.

  11. #8
    Senior Member velvet's Avatar
    Join Date
    Mar 2009
    Last Online
    3 Days Ago @ 09:24 PM
    Status
    Available
    Ethnicity
    German
    Ancestry
    Northern Germany
    Subrace
    Faelid
    Country
    Germany Germany
    State
    North Rhine-Westphalia North Rhine-Westphalia
    Gender
    Age
    45
    Zodiac Sign
    Sagittarius
    Family
    Married
    Occupation
    Pestilent Supremacy
    Politics
    Blut und Boden
    Religion
    Fimbulwinter
    Posts
    4,602
    Thanks Thanks Given 
    651
    Thanks Thanks Received 
    757
    Thanked in
    311 Posts
    Quote Originally Posted by Ringenwald View Post
    I don't follow. How it became so predominant in a population if only a single common ancestor surrounded by a multitude of brown-eyed people had this mutation? How is this possible if "the mutation of brown eyes to blue represents neither a positive nor a negative mutation"? The decrease of melanin production must have been a very positive mutation instead, whatever the reason.
    Consider that today more humans are alive than in the entire history of humans (2-3million years) combined.
    Early populations (everything pre-farming era, depending on the region 5-8k years only) were bands of families with maybe 20-30 people, wandering around. Occasionally, individuals were exchanged between the bands, and once the mutation is present in an individual, it will be inherited to the next generation, regardless of whether the individual has itself blue eyes or not. To spread through the entire living population therefore maybe didnt take longer than a hundred or two hundred years.

    I would agree that the mutation occured longer ago in the context of general lesser melanin = light skin of Neanderthal populations already and not so short time ago only. Neanderthals had light skin, often red hair, often freckles and mostly green or otherwise light eyes. So the mutation probably is rather 30-40k old and resides in a section of DNA that is generally responsible for the light complexion of all Europeans today.

    That it is inherited regardless of the parent's own eye colour, there are plenty of examples, just look at the Becker kids. Even though their facial features are clearly negro, some of them have blue eyes, so unlike former claims, it is apparently not a completely recessive gene that is overwritten once you breed with a brown-eyed individual. The section of the DNA is still inherited and remains intact.
    Ein Leben ist nichts, deine Sprosse sind alles
    Aller Sturm nimmt nichts, weil dein Wurzelgriff zu stark ist
    und endet meine Frist, weiss ich dass du noch da bist
    Gefürchtet von der Zeit, mein Baum, mein Stamm in Ewigkeit

    my signature

  12. #9
    a.k.a. Alpensun Ringenwald's Avatar
    Join Date
    Jun 2011
    Last Online
    1 Day Ago @ 08:41 PM
    Status
    Available
    Ethnicity
    Swiss
    Ancestry
    Switzerland
    Country
    Switzerland Switzerland
    Location
    The edge of the Germanic world
    Gender
    Age
    37
    Posts
    155
    Thanks Thanks Given 
    17
    Thanks Thanks Received 
    14
    Thanked in
    10 Posts
    But this researcher claims that it happened by random chance, "simply" by "trials" of nature and "shuffling" and doesn't represent a positive or negative mutation for survival. How come that this mutation happened just by coincidence with the migration of these people to higher latitudes? Or was this mutation already presents in some "encounters" who have lived at higher latitudes already a long time before and were wandering around as well?

    Then he claims it happened for the first time ever 6 to 10k ago with a single individual: "Before we had all brown eyes"... I don't know who is "we" here and how "brown" it was but, related to the first comment and if a decrease in overall melanin production gives a survival advantage, why it couldn't have happened long before during the many Ice Age cycles while hominids were roaming across Europe? There have been at least 8 glacial cycles during the last million years alone. How do we know that this mutation wasn't present in some populations living in cold climate, even before the Neandertals who themselves didn't fall out of the blue? Is an analysis of 155 people from Denmark, 5 from Turkey and 2 from Jordan enough to prove it given our knowledge?

    I have sparse knowledge on genetics and human population evolution, but I assume the researcher is a believer of the out of Africa replacement theory. This explains the “we” (= Homo sapiens who transformed themselves along the way in many successive waves and isolation from the other hominids). But just wondering how the story goes if there were countless waves of back and forth migrations of many related hominids and this not only between Homo sapiens and Neanderthals but the full spectrum of hominids who lived for millions of years across Europe, Africa and Asia…

  13. #10
    New Member Thulean_explorer's Avatar
    Join Date
    Jan 2019
    Last Online
    4 Weeks Ago @ 03:41 AM
    Ethnicity
    Anglo-American
    Country
    Other Other
    Gender
    Family
    Forgoten
    Posts
    8
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    10
    Thanked in
    4 Posts
    Sorry, but that study is nonsense.

    Blue eyes are recessive and there is no way a single individual was able to spread it in a predominant brown eyed population.

    Is only negative propaganda to make people believe that blue eyes are not part of our heritage and that there is nothing wrong if it goes extinct.

  14. The Following 2 Users Say Thank You to Thulean_explorer For This Useful Post:


Similar Threads

  1. Blue Eyes All Come from One Ancestor!
    By Oski in forum Population Genetics
    Replies: 12
    Last Post: Wednesday, September 22nd, 2010, 05:07 PM
  2. Y-Haplogroups and the «Common Ancestor»
    By ReinaertDeVos in forum Population Genetics
    Replies: 5
    Last Post: Saturday, January 16th, 2010, 12:53 AM
  3. A blue eyed blonde with a brown eyed and red haired brother
    By Mary in forum Genealogy & Ancestry DNA
    Replies: 10
    Last Post: Thursday, October 4th, 2007, 08:04 AM
  4. Blue-eyed men prefer blue-eyed women
    By Agrippa in forum Psychology, Behavior, & Neuroscience
    Replies: 62
    Last Post: Friday, October 27th, 2006, 03:52 AM
  5. 'Most recent common ancestor' of all living humans surprisingly recent
    By Johannes de León in forum Paleoanthropology
    Replies: 9
    Last Post: Saturday, November 13th, 2004, 10:05 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •