FEELING groggy because of lost sleep? Blame your genes. People with two copies of one variant of a gene that helps control our body clocks turn out to suffer worse cognitive deficits after sleep deprivation.
Researchers led by Malcolm von Schantz of the University of Surrey, UK, recruited 12 volunteers with two copies of the “long” version of the gene PER3, which contains a longer stretch of repetitive DNA, and a dozen with two copies of the short version.
People with the long genes tend to be night owls – late to bed and late to rise. After staying awake…
