CRISPR gene-editing mistake results in over a dozen mutant embryos

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Britain approves controversial gene-editing technique

FILE – This Aug. 8, 2008 file photo, shows embryos being placed onto a CryoLeaf ready for instant freezing using the vitrification process. In a statement Monday Feb. 1, 2016, the Human Fertilisation and Embryology Authority, Britain’s fertility regulator, has approved a scientist’s application to edit the human genetic code using a new technique that some fear crosses too many ethical boundaries. (Ben Birchall/PA via AP, File)