Category: Genetics
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Are most people “behaviorally modern”?
Paintings at Lascaux, Prof saxx Behavioral modernity: Behavioral modernity is a term used in anthropology, archeology and sociology to refer to a set of traits that distinguish present day humans and their recent ancestors from both living primates and other extinct hominid lineages. It is the point at which Homo sapiens began to demonstrate a…
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Ancient Roman DNA project
Dienekes already mentioned it, but readers might be curious about the Ancient Roman DNA Project. Here are the details: I’m asking for $6,000 for this project, which will cover the cost of testing DNA from the 20 immigrants to Rome I found in my previous project. Of course, I would love to test additional individuals…
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Men on the move, part n
Ancient DNA suggests the leading role played by men in the Neolithic dissemination: The impact of the Neolithic dispersal on the western European populations is subject to continuing debate. To trace and date genetic lineages potentially brought during this transition and so understand the origin of the gene pool of current populations, we studied DNA…
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In the year 2015….
Recently I was having a discussion with some friends about getting the full genomes of everyone in my immediate family when the price point comes down to $1,000, just as I have had my immediately family genotyped. You can find some interesting stuff just from the genotype alone, which for current affordable platforms aims for…
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Why do we still vary?
I notice that last summer Karl Smith asked “Why Are There Short People?” His logic is pretty good, except for the fact that the fitness variation seems to be much starker in males than females (there is some evidence I’ve seen that shorter women can be more fertile, though that’s balanced by the fact that…
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Australia on fire
Fascinating, Orbital cycles, Australian lake levels, and the arrival of aborigines: But the other big feature is that the lake-filling events that occurred after 50,000 years ago were much smaller than those which occurred before. Climactically, the conditions 10,000 years ago should have been the same as the conditions 115,000 years ago. But the lake…
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The future is not impossible
Alexander Dumas, of mixed race One of the reasons I post regularly on the genetics of mixed-race people and their physical appearance is that I don’t think the media does a good job. There’s a “freak show” element which titillates but does not illuminate. This in a period in the United States where the absolute…
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The genetics of the Kusunda
Kusunda: The Kusunda or Ban Raja (“people of the forest”), known to themselves as the Mihaq or Myahq (< *Myahak), are a tribe of former hunter-gatherers of the forests of western Nepal, who are now intermarried with neighboring peoples and settled in villages. The Kusunda are followers of animism, though Hindu overtones may be seen…
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The genetics of hair texture: a mystery
Lauryn Hill, Image credit: Lisa Lang I received an email today from a friend about speculation on the genetics of hair texture. More specifically, curly vs. straight hair. I know that there are a few SNPs which are correlated with straight vs. curly hair (23andMe has actually been involved in this), but the architecture hasn’t…
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Decency not by law alone
Rasmus Nielsen has a long response below to the issue of the getting some sort of consent from Aboriginals in the local region in regards to a specimen from a deceased individual. He has a full entry on this at the new weblog of his research group. As an aside, let me say that it…
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Sequencing everyone in the Faroe Islands
There was some speculation last week about which nation would have everyone sequenced first. We now have a contender, the Faroe Islands, a self-governing Danish dependency (they’re not part of the E.U.) is going to try and sequence most of the population of ~50,000 over the next five years: Around 100 people who are likely…
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All your genes belong to the tribal council!
Dienekes has already commented on this, but I thought I would go over Ewen Callaway’s piece, Aboriginal genome analysis comes to grips with ethics. It’s not surprising that this was written. Even if you take Keith Windschuttle’s position when it comes to Aboriginal-European contact you can’t escape the reality that Aboriginals did not fare so…
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How Australian Aborigines relate to Indians
The question has been asked. In light of recent papers, below is a stylized tree I drew up (the lengths of the branches don’t equal time!). The indigenous population of Australia is at minimum a compound of two elements. 1) A very distinctive component which may have pushed out of Africa earlier than all other…
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The Australian Aborigines may not be just descendants of first settlers
Just realized. The Science paper has some interesting dates which allows us to make the above inference. – Separation between Europeans and East Asians 25-38 thousand years before present. – Gene flow between proto-East Asians and proto-Australians before the Native Americans diverged from the former 15 thousand years before the present. – A conservative first…
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The words of the father
Over at A Replicated Typo they are talking about a short paper in Science, Mother Tongue and Y Chromosomes. In it Peter Forster and Colin Renfrew observe that “A correlation is emerging that suggests language change in an already-populated region may require a minimum proportion of immigrant males, as reflected in Y-chromosome DNA types.” But…
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The end of “archaic” H. sapiens
The Pith: The Bushmen branch of the human family tree diverged ~130,000 years ago. The non-Africans branched off from the Africans ~50,000 years ago. The Europeans and East Asians diverged ~35,000 years ago. One of the terms in paleoanthropology which can confuse is that of archaic Homo sapiens (AHS). This is in contrast to anatomically…
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Not the great stagnation
Dan MacArthur points me to this story on the sequencing of the West family. You can read the full paper in PLoS Genetics. When the price point for a full genome comes down to $1,000 or so I plan on getting the code for everyone in my immediate family, just like I got everyone genotyped…
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When all probable things can not be right
I’ve been chewing on the modern human range expansion into Neandertal territory paper for a few days now. But I haven’t been able to bring myself to say much. There are two reasons. First, it’s a simulation paper, and I don’t exactly know what I can say besides being skeptical of the plausibility of some…
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Personal genomics & rare populations notes
I’m going to address two points in this post. The next possible target for getting an undersampled population, and the Malagasy results. First, lots of great submissions in regards to populations which are undersampled. Some of them are actually …
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The Merina of Madagascar are Malay and Bantu
A month ago I asked for a Malagasy genotype. Almost immediately I received a response from someone that was 33% Malagasy. More recently I have sent a genotyping kit to someone who is Malagasy. Those results should come in within a month or so. But a fe…