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Thread: 7,000-Year-Old Human Bones Suggest New Date for Light-Skin Gene

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    7,000-Year-Old Human Bones Suggest New Date for Light-Skin Gene

    Instead, "what seems likely, then, is that the dietary changes accompanying the so-called Neolithic revolution, or the transition from food collection to food production, might have caused, or contributed to cause, this change," Barbujani said.

    In the food-production theory, the cereal-rich diet of Neolithic farmers lacked vitamin D, so Europeans rapidly lost their dark-skin pigmentation only once they switched to agriculture, because it was only at that point that they had to synthesize vitamin D from the sun more readily.
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    http://www.livescience.com/42838-european-hunter-gatherer-genome-sequenced.html

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    So what did these Europeans look like before the mutation? Native Americans? Folks from India?

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    Quote Originally Posted by Grossvater View Post
    So what did these Europeans look like before the mutation? Native Americans? Folks from India?
    According to nbcnews like blue-eyed Africans:

    A 7,000-year-old man whose bones were left behind in a Spanish cave had the dark skin of an African, but the blue eyes of a Scandinavian. He was a hunter-gatherer who ate a low-starch diet and couldn't digest milk well — which meshes with the lifestyle that predated the rise of agriculture. But his immune system was already starting to adapt to a new lifestyle.
    Source:http://www.nbcnews.com/science/dark-...id=msnhp&pos=1

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    Quote Originally Posted by Grossvater View Post
    So what did these Europeans look like before the mutation?
    http://www.nbcnews.com/science/dark-...ear-2D11996418

    2D11430827-140126-coslog-skull4.blocks_desktop_large.jpg

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  8. #5
    The rendering posted in the other thread had a skin tone( and hair color) significantly lighter than Subsaharan Africansc

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  10. #6
    What an undistinctive face. Not taking pigmentation into account this type of phase probably exists in Europe, West Asia, South Asia and North Africa. Doesn't look like any group in specific to me.c

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    Quote Originally Posted by newtoboard View Post
    The rendering posted in the other thread had a skin tone( and hair color) significantly lighter than Subsaharan Africansc
    Yes, the reconstruction Jean M's just posted above simply looks like an exceptionally-tanned modern Central European to me. The invoking of SSA's sounds like sensationalist reporting.

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    Quote Originally Posted by DMXX View Post
    The invoking of SSA's sounds like sensationalist reporting.
    They don't know the exact skin shade. They are doing their best!

    Of the ten variants, the Mesolithic genome carried the ancestral and non-selected allele as ahomozygote in three regions:C12orf29 (a gene with unknown function), SLC45A2 (rs16891982) and SLC24A5 (rs1426654) (Table 1). The latter two variants are the two strongest known loci affecting light skin pigmentation in Europeans20–22 and their ancestral alleles and associated haplotypes are either absent or segregate at very low frequencies in extant Europeans (3% and 0% for SLC45A2 and SLC24A5, respectively) (Fig. 2). We subsequently examined all genes known to be associated with pigmentation in Europeans22, and found ancestral alleles in MC1R, TYR and KITLG, and derived alleles in TYRP1, ASIP and IRF4 (Supplementary Information). Although the precise phenotypic effects cannot currently be ascertained in a European genetic background, results from functional experiments20 indicate that the allelic combination in this Mesolithic individual is likely to have resulted in dark skin pigmentation and dark or brown hair.

  14. #9
    Quote Originally Posted by DMXX View Post
    Yes, the reconstruction Jean M's just posted above simply looks like an exceptionally-tanned modern Central European to me. The invoking of SSA's sounds like sensationalist reporting.
    that's about what I would expect. the europeans hgs should already be well differentiated from non europeans, past and present. I'm guessing that most of our distinctive looks are inherited from people 10years ago. its only our skin pigmentation that could evolve so fast.

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    Quote Originally Posted by newtoboard View Post
    What an undistinctive face. Not taking pigmentation into account this type of phase probably exists in Europe, West Asia, South Asia and North Africa. Doesn't look like any group in specific to me.c
    He kinda looks like the Crazy Generous guy in the Vonage phone commercials.

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