This Week in Science

In this week's Science, a team led by Stanford University researchers reports on a new technique for identifying recent changes in allele frequencies using contemporary genome sequences, which they used to study selected-for traits among the ancestors of modern Britons during the past 2,000 years to 3,000 years. Called the Singleton Density Score, the method was applied to evaluate selection signals in more than 3,000 modern genomes from selected from the British population.

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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.