What if there were animals that were genetically close to modern humans, but startlingly different?

What if there were animals that looked very much like modern human animals and almost identical genetically, yet they differed from us in notable ways? Would their discovery shock and horrify people? Quite likely. Wouldn't it also make many people start thinking deeply about the fact that modern humans themselves are animals? You'd hope so. Wouldn't this discovery make us intensely curious about our own origins? Remains to be seen. What follows is a true story. The evidence is overwhelming that large numbers of Neanderthals roamed Eurasia for 200,000 years. The evidence is also clear that Neanderthals differed from the modern humans in genetically small but socially and physiologically significant ways. This incredible story can be found in the October 2008 edition of National Geographic, in an article entitled "Last of the Neanderthals." This article is a must read article for anybody who wants to peer into the not-so-distant past in order to learn about his or her bipedal cousins. The article is filled with incredibly lifelike modeling of the Neanderthals. It is also filled with detailed information about Neanderthal physiology, as well as clues to Neanderthal lifestyle.

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Carl Craver’s case for integrative neuroscience instead of reductionism

As I mentioned in two previous posts (here and here), I recently had the opportunity to attend several of the sessions of the “Future Directions in Genetic Studies” workshop at Washington University in St. Louis. One of the speakers was Carl Craver of Washington University. Craver's talk was titled, "The…

Continue ReadingCarl Craver’s case for integrative neuroscience instead of reductionism

Our hunger for “The Gene for X” stories and other simplistic explanations

Can one gene make a difference?  Absolutely.  One case in point is Tay-Sachs Disease, a physical condition  where the central nervous system begins to degenerate in a four to six month old child who, until the onset of the disease, appeared normal.  Individuals with Tay-Sachs disease have two copies of a genetic mutation, one copy inherited from each parent.  In a carrier of Tay-Sachs, only one gene is different when compared to non-carriers. That’s how important one gene can be.   When we’re talking about complex behaviors, though, can the “cause” really boil down to one gene?  It’s unlikely.

I recently had the opportunity to attend several sessions of the “Future Directions in Genetic Studies” workshop at Washington University in St. Louis. On Friday, I attended a lively seminar led by Gar Allen, who teaches biology at Washington University. His talk was entitled “What’s Wrong with ‘The Gene for . . .’? Problems with Human Behavior Genetics and How to Combat Them.”

Allen opened his talk by asserting that claims about the genetic basis for complex human behaviors and traits are “notoriously difficult to investigate and replicate.” There is a long and troubled history of claims that genes are the cause of various conditions. For instance, in 1969, Arthur Jensen became the center of a storm when he wrote that Caucasians were more intelligent than African-Americans, suggesting that there was a genetic basis for this difference. Jensen’s position has been heavily criticized by numerous scientists on numerous …

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