linkfest – 02/25/13

Natural selection acts to maintain diversity between Out of Africa and sub-Saharan African populations in genes related to neurological processes and brain development – aapa abstract @race/history/evolution notes.

Hispanic Genomic Diversity, Part I: European, African, and Amerindian Admixtures and the Taíno ‘Extinction’ Controversy“This post deals with the variance in European, African, and Amerindian/Taíno admixture in five of the twenty Hispanic subgroups….” – from nelson!

Misguided Nostalgia for Our Paleo Past“Gregory Cochran and Henry Harpending even suggest that human evolution as a whole has, on the contrary, accelerated over the last several thousand years, and they also believe that relatively isolated groups of people, such as Africans and North Americans, are subject to differing selection. That leads to the somewhat uncomfortable suggestion that such groups might be evolving in different directions—a controversial notion to say the least.” – i dunno why that suggestion should be uncomfortable, but i guess it is. -?- see also steve sailer.

Predictable evolution trumps randomness of mutations“Separate bacteria populations may respond to environmental changes in identical ways.”

Mediterranean Diet Cuts Heart Disease Risk – IN MEDITERRANEAN PEOPLE! – “Heart disease experts said the study was a triumph because it showed that a diet was powerful in reducing heart disease risk, and it did so using the most rigorous methods. Scientists randomly assigned 7,447 people in Spain who were overweight, were smokers, or had diabetes or other risk factors for heart disease to follow the Mediterranean diet or a low-fat one.” – *facepalm*

Where Men See White, Women See Ecru“Neuroscientists prove what we always suspected: the two sexes see the world differently” – i love ecru!

Why Women Talk More Than Men: Language Protein Uncovered – FOXP2 gene. and an objection: The “Language” Gene and Women’s Wagging Tongues.

Bone Marrow Transplants: When Race Is an Issue – via hbd biblography.

“Know Thyself” Is A Lot To Ask

Low mobility associated with inherited ability is no social tragedy – from gregory clark, via jayman.

The sociology of dysgenia“Eugenics is a great idea, and perhaps it’s not as complex as I make it to be here. But the fact remains that for all we speculate, we know very, very little about it.” – from spandrell. via foseti.

Modern sub-fertility may be a pathologically slow life history, triggered by a supernormal stimulus of modernity – from bruce charlton. see also mangan and malcolm pollack.

The Riddle of the Human Species – multilevel selection argumentation from e.o. wilson. i like the opening paragraphs very much. (^_^)

Can India’s Democracy Defeat Corruption?“Of course, big corruption scandals are commonplace in the developing world (and the developed world, for that matter). Yet the scale and relative peacefulness of the corruption debate in India may be unprecedented…. And although the Indian political system is imperfect in ways too numerous to list here, the central authorities most of the time do respect free speech and free press. Civil society works. Freedom of association works….”

Study finds maize in diets of people in coastal Peru dates to 5,000 years ago“Up until now, the prevailing theory was that marine resources, not agriculture and corn, provided the economic engine behind the development of civilization in the Andean region of Peru.”

Fun With HBD: Racial Differences in Women’s Asses – (~_^)

How Christianity stopped Anglo-Saxon England eating horsemeat: Church officials claimed it was ‘pagan’ food

bonus: The Big Question“Q: What day most changed the course of history?” – i like freeman dyson’s response. (^_^)

bonus bonus: Dolphins Call Each Other By Name“Bottlenose dolphins call out the specific names of loved ones when they become separated, a study finds. Other than humans, the dolphins are the only animals known to do this….”

bonus bonus bonus: The Meanest Girls at the Watering Hole – behavioral evidence suggests that hierarchy is heriditary in elephants.

bonus bonus bonus bonus: Grey langurs spotted treating a wild dog to a grooming session in India

bonus bonus bonus bonus bonus: How male alligators have PERMANENTLY erect penises which they keep hidden inside their bodies

bonus bonus bonus bonus bonus bonus: Most zombie ant photographs are upside down

bonus bonus bonus bonus bonus bonus bonus: The 15th-Century Equivalent of Your Cat Walking on Your Keyboard – meow!

(note: comments do not require an email. it’s a dog’s life.)

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19 Comments

  1. “Misguided Nostalgia for Our Paleo Past”

    That’s the thing though. I don’t think we have a single “our” paleo past. For some people in the middle east their paleo past was 10,000 years ago while for others it was a lot less.

    Reply

  2. @g.w. – “That’s the thing though. I don’t think we have a single ‘our’ paleo past.”

    very good point! human biodiversity prolly (likely) also applies to our very distant past, too.

    Reply

  3. I work in bone marrow transplant. The situation for mixed race patients and many minority patients is really quite bleak. They’re currently researching doing haplo matched transplants so that parents could donate to children, but it’s still getting sorted out.

    Interestingly I got encouraged to join the registry in part because I’m part French Canadian. For whatever reason, French Canadians have some unusual typing that makes them hard to match. It tends to come up a lot when we have patients from northern Maine.

    Reply

  4. @bs king – “The situation for mixed race patients and many minority patients is really quite bleak.”

    that’s a shame. =/

    @bs king – “For whatever reason, French Canadians have some unusual typing that makes them hard to match.”

    huh! i wonder why that is?

    Reply

  5. “Of course, big corruption scandals are commonplace in the developing world (and the developed world, for that matter).”

    I’ve often thought about this, and I reckon that Western/First-world societies are just as corrupt, the only difference is the medium of exchage for our corruptness is moral/social status rather than money. (i.e. multicultural/feminist/liberal/marxist pieties and the hypocracies of those who preach them. “Diversity is great! <-while you live in an all white gated community and send your children to all white private schools.")

    Reply

  6. French Canadians (FC) had a small founder population. This would lead to more genetic drift. It also means that they are more homogenous, so it should be easier to get a match from another FC. I’m guessing that FCs living in Canada don’t have trouble finding matches, but if you live on the US side of the border there are going to be fewer donors. Also if you’re not pure FC you might not match with FC or non-FC. You might only match a small fraction of the hybrids? That’s my guess.

    Reply

  7. Natural selection acts to maintain diversity between Out of Africa and sub-Saharan African populations in genes related to neurological processes and brain development – aapa abstract @race/history/evolution notes :

    Strikingly, of the regions where purifying selection is acting to maintain diversity between the Out of Africa and sub-Saharan African populations, eight out of twelve genes with known ontologies are involved in neurological processes or brain development.

    Be cool to do this with Melanesians and Malagasy as well, as populations with minority East Eurasian mixture, as well as with populations who are more mixed 50:50 (East Africa? Uighur? South Asian?).

    I’d interpret it as these being regions where the genes are adapted to the presence of other genes (coadapted gene complex) and the admixture has disrupted that, resulting in selection back for what fits with the majority of the genome / sites involved, rather than a difference in environmental selective pressure. Don’t know how they would test which of those is true though.

    Reply

  8. @T

    Actually there is a high amount of international cooperation in bone marrow registries, so where you are located as a patient makes little difference. American hospitals can search Canadian registries just as easily as their own.

    That’s actually a large reason why Caucasian populations have a much easier time finding a donor. When they look for a match, you are looking at all countries who have a donor registry. Donor registries are extremely well established in countries that have a well set up health care systems….i.e. the US, Canada and European countries. So a Caucasian needing a match not only draws on the US population of donors (which are predominantly Caucasian) but also from the registries in their country of origin.

    Someone who was African-American on the other hand faces the fact that there are not many African Americans in the US registry, combined with the fact that very few African countries have the infrastructure to maintain a bone marrow donor registry.

    Interestingly, Germany actually has the best set up registry in the world.

    @hbd chick
    The explanation I got about FCs was that there’s a particular set of alleles their likely to have to have that are not found in any other ethnic group. Among most ethnicitys there are alleles you’re more or less likely to have, but very few that are completely unique.

    Not sure why that is of course, but I blame the cheap liquor.

    Reply

  9. “Natural selection acts to maintain diversity between Out of Africa and sub-Saharan African populations in genes related to neurological processes and brain development”

    Could someone explain what they mean by “maintain diversity” in this article. If there is gene flow into and out of Africa wouldn’t that reduce diversity?

    Reply

  10. To answer my own question, they must mean there would be more diversity within each population group even thought there would be less between the two.

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  11. re: “Low mobility associated with inherited ability is no social tragedy”

    Low social mobility is only a problem if you assume most people are trapped in miserable lives from which they are trying to escape. For societies in which ordinary people can lead a good life it wouldn’t be such a problem.

    I object to the idea that the American Dream means, or should mean, that anybody can strike it rich in America as opposed to the idea that anybody who works and plays by the rules can lead a good life in America.

    Unfortunately even the Democratic Party has fallen prey to the former definition. Of course talent should have an opportunity to succeed in America but I don’t believe in government of the talented, by the talented, and for the talented, which is a view that only talented minorities could subscribe too. (You know who you are.)

    I also object to the idea that the test of a good society is how well it treats its least fortunate members when this becomes an excuse for ignoring the welfare of the majority.

    These are two cliches that are killing democracy in America. “Race to the top” is only the latest expression of this same basic idea, along with the whole notion of “getting ahead.” When those phrases come out of the mouths of Democrats like Obama and Hillary Clinton I want to scream.

    Reply

  12. Could someone explain what they mean by “maintain diversity” in this article. If there is gene flow into and out of Africa wouldn’t that reduce diversity?

    Luke: As far as I can tell –

    For some genes, there are different versions which are respectively high frequency for all African and all West Eurasian populations (I think this is what they are saying).

    For populations which have admixed so that they have a clear minority of (African or West Eurasian) and a corresponding clear majority of (West Eurasian or African), it seems like selection is moving these genes back to what what have been the frequency in the population provides the majority of their ancestry

    So a population which is 75% African and 25% West Eurasian [e.g. African Americans] would move to have a frequency no different from Africans on these genes, while they remain around 75% African 25% West Eurasian across the rest of their genome.

    I think this might be because the genes are selectively disadvantageous at intermediate frequencies, so they move to the closest state of advantageous frequency (mechanically morphs who are entirely African in frequency of alleles on these genes are more likely in a population which is 75% African 25% West Eurasian than morphs who are entirely West Eurasian, even if both of these morphs have no more advantage over morphs who have the intermediate frequency). But that’s just speculation. There could be some environmental selection that cleaves between the environments of the Maasai, Mozabites and Yemeni, even though they seem pretty close in space and various variables (hot, arid, etc.).

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  13. I mentioned that talent should have an opportunity to succeed in America. Come to think of it, it does. It is hard to imagine a society more perfect in that regard. It’s everybody else who has been forgotten.

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  14. “human biodiversity prolly (likely) also applies to our very distant past, too.”

    for people from the middle east near where agricultuure started who have had 10,000 years to adapt to it i’d guess paleo ideas (related to diet) are misguided but it maybe different for those who’ve only been adapting to it for a 1000 or 3000 years.

    frinstance i wonder if the obesity epidemic in the states correlates with ancestral history with the people who spent the least time under agriculture being the most effected?

    Reply

  15. French Canadians did have a population bottleneck, as the whole batch of ’em were descended from 2600 couples from a circumscribed region. You told us that last month, remember?

    The Big Question. Sunday.

    Reply

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