NEW YORK (GenomeWeb) — Exact Sciences today announced that the American Cancer Society's national guidelines on colorectal cancer prevention and early detection have been updated to reflect the commercial availability of the company's Cologuard cancer screening test.

Cologuard detects cancer-associated mutations and blood biomarkers in stool samples and has been shown to identify 92 percent of colorectal cancers in average risk patients with 87 percent specificity using only a single sample.

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Technology Review reports that researchers in the US have used CRISPR to modify a number of human embryos.

By introducing genes from butterfly peas and Canterbury bells, researchers in Japan have developed a blue chrysanthemum, according to NPR.

Plant researchers plan to sequence some 10,000 samples that represent the major plant clades, ScienceInsider reports.

In Nature this week: a Danish reference genome, and more.