This Week in Nature

In this week's Nature Genetics, an international team of researchers reports on a study of the genetic similarities between distantly related marine mammals, providing new insights into how these animals developed similar traits despite their different ancestries. The researchers sequenced the genomes of the killer whale, walrus, and manatee, and refined the genome sequence for the bottlenose dolphin.

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Researchers report that deleting one gene from butterflies affects their wing coloration patterns, according to the Washington Post.

The Seattle Times writes that pharmacogenomics testing can help choose medications that may work best for people with depression.

In PNAS this week: genome sequencing of weevil symbionts, retinoid X receptor deletion in lung cancer metastasis, and more.

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