Friday, March 10, 2006

Hap hap haplotype

I'm not in the habit of reading this online journal, but I thought I'd give this article a whirl after reading about it in the newpaper. The upshot is that human beings were still evolving much more recently than previously thought, perhaps only 6600 years ago.. Not only that, but genetic change occurred swiftly and surely.

The evidence for this is the presence of novel chromosome mini-fragments (haplotypes) in three human populations: African, East Asian, and Northern European. The types of genes relate to metabolic function, like the sensitivity to alcohol in East Asians or skin pigmentation (Europeans) or hair morphology (Africans).

Natural selection, adaptation, survival. It's the same old, same old. But is human evolution happening today? All you need is differential survival of one or more genes. What genotypes leave more of themselves in the next generation? What genotypes tend to mate with each other? I don't think it's possible today unless among remote tribes that do not mate outside their circle.

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