University of Cambridge researchers report in Genome Biology on evidence that horizontal gene transfer has occurred in metazoans. Cambridge's Gos Micklem and colleagues examined the genomes and transcriptomes of 10 primates, 12 flies, and four nematodes to calculate what they called an HGT index score that reflected how well each transcribed gene aligned to metazoan versus non-metazoan sequences.

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Direct-to-consumer genetic testing companies have offered to test families separated at the southern US border, but that raises ethical issues.

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The New York Times reports on a project to develop a tree DNA database to uncover illegal logging.

In PLOS this week: links between gut microbiome and colorectal cancer mutations, targeted sequencing uncovers genetic susceptibilities to epilepsy in Koreans, and more.