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Genes & Cells

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beagle in the lab

A LITTLE HELP  Beagles that encountered an impossible problem — an immovable lid covering a treat (shown) — sometimes sought help from a nearby human stranger. Variations in a gene previously linked to autism in humans may influence the dogs’ people-seeking behavior.

IN WITH THE NEW  One technique to replace faulty mitochondria in egg cells has resulted in the birth of a healthy baby boy. The five-month-old is the first “three-parent baby” born using the spindle nuclear transfer procedure.

human embryo

EDITS UNDER WAY  Researchers in Sweden have begun editing genes in viable early human embryos (four-cell stage, shown). Others are probably doing the experiments behind closed doors, scientists say.

Genes & Cells

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