Brayson Thibodeaux's parents and grandparents suspected there was something wrong with the 15-month-old boy as he wasn't yet walking, and as Scientific American Mind reports, that suspicion led them to a genetic test that revealed that fragile X syndrome had been affecting the family for generations, though in different ways.

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Dog DNA testing finds that some purebreds might not truly be purebreds, Inside Edition reports.

Mary Beckerle has returned as director of the Huntsman Cancer Institute, according to ScienceInsider.

Smithsonian Magazine reports that environmental DNA sampling can be used to track elusive organisms.

In Genome Research this week: repetitive satellite DNA in the fruit fly, transcriptome map assembly pipeline, and more.