Sections of the genome, known as expression Quantitative Trait Loci (eQTL) work to control how genes are turned off and on. Darryl Leja, NHGRI

NIH-funded researchers have completed a detailed atlas documenting the stretches of human DNA that influence gene expression a key way in which a persons genome gives rise to an observable trait, like hair color or disease risk.

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https://www.nimh.nih.gov/news/scienc...gn=rss_summary