Africa may be genetically diverse, but that doesn't mean what you think. Genetic diversity ≠ phenotypic diversity.https://twitter.com/gcochran99/status/876120409401417730 …
This strange argument seems to have become quite fashionable as of lately.
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Why do you find it strange?
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Founder effects are well known. They reduce genetic diversity but generally don't affect polygenic traits.
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Why wouldn't they affect polygenic traits
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Affected loci are randomly distributed hence no impact on polygenic traits, but possibly large on monogenic.
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It depends on the size of the founder sample, if it's smaller the variation can be important. Plus the subset may not be random.
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Also depends on number of causal variants. The larger, the smaller effect. Nut do some simulations!
End of conversation
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