Gene Expression

Archives for September, 2006

Check out the data posted by rikhurzen from the GSS.

What do Y & mtDNA tell us?

RPM has a post up about Y and mtDNA lineages, and what they can (or can’t) tell us about demographic history. I’m pretty skeptical myself about the broad and detailed deep time inferences some make with these markers (see The Real Eve for an extreme case), but Dienekes points me to a situation where there…

Culture naturally

Back in August AlphaPsy had series of posts on ‘naturalism’ in the context of culture. Check them out! (links below) I strongly believe it is important to discuss human affairs with a multi-disciplinary lens, too often the public discourse is presupposed on naive psychology, while elite models tend to fixate on one dimension (e.g., the…

Fisher and population size

One of the major dialogues in evolutionary genetics in the 20th century was that between R.A. Fisher and Sewall Wright. It is so seminal that the term Fisher-Wright controversy is often used. One of the major points of disagreemant between Fisher and Wright was the role of population substructure and the relevance of long term…

Katz tale

Tall, to short, to tall (again)

Dienekes reports on a paper which chronicles the change height of “Europeans” over the last 20,000 years ago. Anthropologist Henry Harpending once told me that when the first modern humans arrived in European 40-30 thousand years ago they were as slim and towering as modern Nilotic peoples, in other words, they were evolutionary reflections of…

Discrete continuity in genetics

In the post below on skin color within a multiracial family I made the point that genetics is inherited in a discrete fashion. In the post-genomic era, or even the post-DNA era, this seems intuitively clear. Our genetic sequence, our genome, is a string of precisely four base pairs, A, G, T and C. The…

Genetics reference

Check out this Mendelian Genetics reference site, which has an enormous catalogue of links. It doesn’t just talk about Punnett Squares, there’s also a link to a simple introduction to the chi square test.

Brown gaucho & Tangled Bank #63

Our old friend Brown Gaucho is hosting Tangled Bank #63. I enjoyed his post, The importance of evolution in medicine. BG is a primatologist-turned-med student, so he knows of what he speaks. But, I do have to take some issue with this contention: Anatomically and genetically, humans haven’t changed all that much in the past…

Can you tell if you’re black or white?

Last winter a story surfaced about “black” and “white” twins. As you can see by the picture the main difference is in skin color, though genetically full sisters (fraternal twins), one twin has the complexion typical of a northern European, while the other is darker skinned. Contrary to the news reports the darker skinned twin…