Bigger data reveal the second, third and fourth switches controlling a gene
We now take for granted the idea that a genome-wide association study, or GWAS, can help identify genetic variants associated with complex traits. Such studies have identified loci associated with everything from breast cancer to heart disease to diabetes.

<p>We now take for granted the idea that a genome-wide association study, or GWAS, can help identify genetic variants associated with complex traits. Such studies have identified loci associated with everything from breast cancer to heart disease to diabetes.</p>