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Thread: Kissing Cousins Produce More Kids and Grandchildren – Claims Iceland Study

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    Kissing Cousins Produce More Kids and Grandchildren – Claims Iceland Study






    Iceland's 'Kissing Cousins' Breed More Kids
    Researchers Remain Unclear on Reasons Behind Apparent Trend



    They would show a white couple holding hands SDM

    While the thought of searching for a potential mate at a family reunion might sound repulsive to some, researchers in Iceland report that "kissing cousins" may produce more children and grandchildren than unrelated couples.

    A study released Thursday in the journal Science found that marriages between third or fourth cousins in Iceland tended to produce more children and grandchildren than those between completely unrelated individuals.

    Researchers at the deCODE Genetics company in Reykjavik mapped out kinship among all known Icelandic couples whose members were born between 1800 and 1965. They then compared the numbers of children and grandchildren descended from these 160,811 couples.

    Researchers were shocked to find that for women born between 1800 and 1824, marriages between third cousins produced an average of 4.04 children and 9.17 grandchildren, while marriages between eighth cousins or more distantly related couples had averages of only 3.34 children and 7.31 grandchildren.

    For women born between 1925 and 1949, with mates related at the degree of third cousins, the average number of children and grandchildren were 3.27 and 6.64, compared with 2.45 and 4.86 for those with mates who were eighth cousins, or more distantly related.

    "These are counterintuitive, almost dislikable results," said Dr. Kari Stefansson, senior author of the paper on the study.

    Dislikable, because our intuition is that the more closely related you are to your mate, the higher the chances of passing along the unfortunate traits so often associated with inbreeding.

    Researchers believe the trend toward a more prodigious relationship with a not-so-distant relative must have a biological basis, though scientists have not identified exactly what biological mechanism could be behind this.

    "One of the things you have to realize is that the definition of a species is 'a group of individuals that are sufficiently related to each other to be able to reproduce,'" Stefansson added. "This definition assumes that individuals that reproduce together have a minimal relationship to each other.

    http://abcnews.go.com/Health/Reprodu...4258128&page=1

    I wonder what is the main point of this article? I think its claiming inbreeding resulting an impact on intellectual and mentally retarded. Typical researchers
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    I wonder what is the main point of this article? I think its claiming inbreeding resulting an impact on intellectual and mentally retarded. Typical researchers
    Same here only thing i get out of it is that alot there are inbreed people in Iceland.
    Sounds like the people from Morocco that live here 60% or so breeds with familly....:

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    I think that it sounds like vindication of the optimum out-breeding principle.

    Breeding with third or fourth cousins is perhaps optimal.

    I would like to see the facts and figures on transracial couples.

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    Quote Originally Posted by Hanna View Post





    Iceland's 'Kissing Cousins' Breed More Kids
    Researchers Remain Unclear on Reasons Behind Apparent Trend



    They would show a white couple holding hands SDM

    While the thought of searching for a potential mate at a family reunion might sound repulsive to some, researchers in Iceland report that "kissing cousins" may produce more children and grandchildren than unrelated couples.

    A study released Thursday in the journal Science found that marriages between third or fourth cousins in Iceland tended to produce more children and grandchildren than those between completely unrelated individuals.

    Researchers at the deCODE Genetics company in Reykjavik mapped out kinship among all known Icelandic couples whose members were born between 1800 and 1965. They then compared the numbers of children and grandchildren descended from these 160,811 couples.

    Researchers were shocked to find that for women born between 1800 and 1824, marriages between third cousins produced an average of 4.04 children and 9.17 grandchildren, while marriages between eighth cousins or more distantly related couples had averages of only 3.34 children and 7.31 grandchildren.

    For women born between 1925 and 1949, with mates related at the degree of third cousins, the average number of children and grandchildren were 3.27 and 6.64, compared with 2.45 and 4.86 for those with mates who were eighth cousins, or more distantly related.

    "These are counterintuitive, almost dislikable results," said Dr. Kari Stefansson, senior author of the paper on the study.

    Dislikable, because our intuition is that the more closely related you are to your mate, the higher the chances of passing along the unfortunate traits so often associated with inbreeding.

    Researchers believe the trend toward a more prodigious relationship with a not-so-distant relative must have a biological basis, though scientists have not identified exactly what biological mechanism could be behind this.

    "One of the things you have to realize is that the definition of a species is 'a group of individuals that are sufficiently related to each other to be able to reproduce,'" Stefansson added. "This definition assumes that individuals that reproduce together have a minimal relationship to each other.

    http://abcnews.go.com/Health/Reprodu...4258128&page=1

    I wonder what is the main point of this article? I think its claiming inbreeding resulting an impact on intellectual and mentally retarded. Typical researchers

    Gee whiz why the study haven't they heard of Kentucky?
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    3rd and 4th cousins aren't really that closely related, having only 1/8 and 1/16 common recent ancestors compared to 1/2 for 1st cousins or all of them for siblings.
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    That actually seems to fit perfectly with the notion that human beings are initially from a tribal society. Tribal societies tend to run in the thousands so it would have similar circumstances to isolated societies like that of Iceland.

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    My parents are related seven generations back, they have two offsprings(my brother and I) but my uncle(father's side) on the other hand and his wife who are fourth generation cousins have five children. I guess there might be some truth to this.

    I wish the Icelandic gene pool was a bit more diverse and larger, Inherited genetic disorders are a bit more common here than in the rest of Europe.

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