People free to choose usually don't marry their cousin
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Replying to @RealYeyoZa @JayMan471
well, especially not if they grew up knowing them (westermarck effect). dunno about the rest.
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Replying to @RealYeyoZa @JayMan471
yeah, but that's all (mostly) WEIRD pops, as usual.
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Replying to @hbdchick @JayMan471
Sure, but same phenomenon seen in other mammals, would make sense there are evolved mechanisms to avoid too much inbreeding. Parents might have different interests though.
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Replying to @RealYeyoZa @JayMan471
not clear what's going on in other mammals, tho: MHC–disassortative mating preferences reversed by cross–fostering https://royalsocietypublishing.org/doi/abs/10.1098/rspb.1998.0433 … ¯\_(ツ)_/¯
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Replying to @hbdchick @JayMan471
There is also evidence of other forms of recognition https://www.sciencedirect.com/science/article/pii/S0960982207021380 …
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However, if the evidence of the studies on humans mentioned above is correct it means we can identify kin by scent above chance. Unlikely that such a primal mechanism has diverged and reversed among different human populations.
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Replying to @RealYeyoZa @JayMan471
hmmm. i'd def like to see further research on this one. the subjects in this study all come from some ADHD study - all these couple have at least one kid with ADHD. that ain't random sampling.
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Yeyo Retweeted Rolf Degen
Good point, seem to be a replication here though. For both assortative and disassortative matinghttps://twitter.com/DegenRolf/status/1110573522949234689 …
Yeyo added,
Rolf Degen @DegenRolfPeople choose spouses and friends whose genomes bear a specified amount of similarity (and contrast) to their own, with loci exhibiting similarity evolving faster. https://www.amazon.com/Blueprint-Evolutionary-Origins-Good-Society/dp/0316230030/ref=tmm_hrd_swatch_0?_encoding=UTF8&qid=1553615772&sr=1-1 … pic.twitter.com/miDmySOFMr2 replies 1 retweet 1 like
Actually, the author of this study, Christakis, points out that they did not find evidence of disassortative mating for MHC.
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Replying to @DegenRolf @hbdchick and
Main problem with Westermarck effect is that it doesn't allow kin recognition for siblings from previous litters. There should be some other mechanism at place.
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