A massive search for a prime suspect in the mystery of the missing heritability has come up empty. Known as copy-number variations, or CNVs, these extra or missing sequences of the genome have been linked to some rare diseases. Researchers thought they might play a role in common diseases, too. But a comparison of 19,000 genomes found few links to breast cancer, diabetes and six other major killers. Copy-number... 

While we’re all in the Halloween spirit…  Read More »