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From Nature Genetics:
Meta-analysis of the heritability of human traits based on fifty years of twin studies
Tinca J C Polderman, Beben Benyamin, Christiaan A de Leeuw, Patrick F Sullivan, Arjen van Bochoven, Peter M Visscher & Danielle Posthuma
Nature Genetics 47, 702–709 (2015) doi:10.1038/ng.3285
Received 13 February 2015 Accepted 01 April 2015 Published online 18 May 2015
Despite a century of research on complex traits in humans, the relative importance and specific nature of the influences of genes and environment on human traits remain controversial. We report a meta-analysis of twin correlations and reported variance components for 17,804 traits from 2,748 publications including 14,558,903 partly dependent twin pairs, virtually all published twin studies of complex traits. Estimates of heritability cluster strongly within functional domains, and across all traits the reported heritability is 49%.
This is not to say that Nurture or Environment or anything terribly specific accounts for the other 51%. Just call it All Else.