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Thread: First modern Britons had 'dark to black' skin, Cheddar Man DNA analysis reveals

  1. #176
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    1 out of 1 members found this post helpful.
    Quote Originally Posted by halfalp View Post
    I dont want to be harsh but, if this guy in the video is dark-pigmented so most of Europe is.
    That's what I was thinking. If that man is quite dark-pigmented, then most Europeans are dark and many Southern Europeans are outright black. :-O

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    DNA Land Coffee Consumption Trait Prediction Report for Cheddar Man:

    Your inferred trait is: 2.9 cups per day (Higher Than Average Consumption)

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    3 out of 3 members found this post helpful.
    As a Norwegian I feel I should point out that the amount of UV radiation you get exposed to is not just dependent on the infalling UV due to latitude. How much snow there is reflecting the UV is a major contributor. A flat snow plain will reflect quite a bit of the UV at you, and a sloping snowcovered valley can blast you with UV from every direction. If you spend half the year operating in snow at near mediterranean latitudes I would guess the UV would be even worse than it is this far north.

    Retaining melanin protection might have made a lot of biological sense during the ice age.

    Quote Originally Posted by ToBeOrNotToBe View Post
    Nothing plausible explains it to my knowledge, selection based on latitude would have to be ridiculously intense to explain this. I think it's more likely, if the increase in Southern brown eyes isn't due to Meds, that another different HG group further South just happened to have browner eyes.

    Also, 8000 ybp is the approximate date of the Neolithic in Europe so that could be what's being referred to (i.e. the increase in brown eyes is from Meds).
    An extreme cline maintained through 8000 years of people moving and mixing cannot be explained by one group just happens to have brown eyes. There is some pressure going on there. But its unknown what it is.

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    https://www.khanacademy.org/partner-...lor-perception

    Which gives me a hunch that light refraction off environment might have something to do with eye color.

    De-pigmented eyes reflect more light, hence the blue perception.



    https://en.wikipedia.org/wiki/Blue

    https://usatoday30.usatoday.com/news...lue-eyes_N.htm

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    1 out of 2 members found this post helpful.
    I absolutely do not believe Cheddar man was that dark. In England they have also done facial reconstructions on ancient remains and of coarse one of the females is done up in dark skin. What I see in ancient DNA is an opportunity for political gain I believe it's being used to show native populations that the new wave of immigration has a dog in the fight and belong. I am very uncertain of the science that has the ability for detecting skin and eye color from ancient bones. Gedmatch predicted I had light blue eyes only I have brown and that is from living tissue. Just IMO
    Gedmatch XU4567275 and RN2151506

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    1 out of 1 members found this post helpful.
    Statistically I think science will approach more and more to prediction of the pigmentation, even if some unknown secondary genes can blur the results; to date even science doesn't know all, evidently. And I doubt in a political try to use false scientific works for political purposes, in these matters. I fear mor the journalists love for sensation and even more the titles they choose...
    aside: the states produced by the extract provided by ArchetypeOne doesn't seem to scientific for me: the notion of "blue" eye is a bit unprecise concerning pigmentation, I prefer the notion of light eye; there are more than a sort of "blue"; I doubt absolutely that Estonia has so much true blue (light) eyes; the maximum is in Scandinavia, more exactly Iceland (before immigration to come?).

    concerning selection, it's not a straightforward phenomenon, because organisms can answer to selective pression with more than a "weapon" and some other metabolic conditions can reduce or reinforce the pression on a precise phenotypic response. It's why we have globally evidence of selection, but that in details it doesn't coincid to what we are waiting.
    Concerning eyes colour, I think that other genes are responsible of the selection, not only the specifi ones. Linkage effects?

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