THIS IS IRRELEVANT TO THE QUESTION OF SELECTION PRESSURE ON THE BREEDING POPULATION. The fuckpic.twitter.com/uuMXeh6Bvu
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This is what selection pressure on a polygenic trait can accomplish in a short time. From http://ps.oxfordjournals.org/content/93/12/2970.full.pdf+html …pic.twitter.com/8VRNPXiZx7
Determining specific genetic factors in this kind of change is hard: small changes in the distribution of many genes. No smoking gun.
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