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Readers question gene-drive engineered mosquitoes and their predators

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12:30pm, January 29, 2016

Gene drives at the wheel

Tina Hesman Saey discussed the power of a new gene-editing technique to boost the development of gene drives in “Gene drives unleashed” (SN: 12/12/15, p. 16). Gene drives have the potential to eradicate insectborne diseases, Saey wrote, or remove invasive species from non-native environments. But the tremendous possibilities of this technology had several readers worried.

Ellen Gryniewicz wanted to know what effect a gene drive–engineered mosquito might have on the bats and birds that eat the insect. “How often is this driver going to be incorporated into the predator’s

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