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Biologists give beetles a functional third eye

This time around, the team deliberately disrupted that gene, to fuse that extra pair into one compound eye. Then, they examined the new organ’s function, using several tests to confirm that it had the same cell types, expressed the same genes, grew the required nerve connections and behaved like a normal eye. Best of all, the researchers say, is that it was relatively simple to do, requiring a minor tweak of a gene that’s common to most organisms.

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