This Week in PLOS

Circulating cell-free DNA originating from malignant tumors appears to have shorter fragment lengths than other cell-free DNA in the blood, according to a study in PLOS Genetics by a team from the University of Utah and elsewhere.

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.