At first glance it may not seem like such a big deal to sell flounder and call it cod. But such "seafood fraud" is being taken very seriously by the US Food and Drug Administration, which is now using genetic testing and a database of "DNA bar codes" to combat these fishy crimes, reports Scientific American's Clare Leschin-Hoar.

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Sequencing could help combat foodborne illnesses, according to a blog post by Food and Drug Administration officials.

Popular Mechanics reports that Caltech researchers have built a prototype nanobot using DNA.

The Sacramento Bee writes that direct-to-consumer genetic testing connected a woman to sperm donor-conceived half siblings.

In PLOS this week: gene expression catalog for sheep, viral diversity among respiratory samples from camels, and more.