In a study accepted in Molecular Psychiatry 1,409 high-intelligence individuals mostly of white ethnicity ( IQ > 170) were subjected to exome genotyping and compared to controls (n = 3253) with IQ < 70.
The researchers identified that rare allele was less frequently observed in the high intelligence group indicating that rare functional alleles are more often detrimental than beneficial to intelligence.
The Full article can be accessed at:
http://www.nature.com/mp/journal/vaop/ncurrent/full/mp2015108a.html
It's open access. Enjoy!!
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