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“What we realized was that the signal for height was coming from almost the whole genome,” he said. If the genome were a long string of ornamental lights, and every DNA snippet linked to height were illuminated, more than 100,000 lights would be shining all the way down the string. That result contrasted starkly with the general expectation that GWAS findings would be clustered around the most important genes for a trait. - www.quantamagazine.org