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A Gene Necessary for Reproductive Suppression in Termites

Knocking out the Neofem2 gene in queen termites illicits pre-reproductive behavior in workers. A major transition in evolution is the origin of a division between reproduction and work among individuals. Nowhere is this divide more striking than in social insects, where workers rarely produce offspring even though they are often capable of reproduction should the queen or king die. The molecular mechanisms that control worker reproduction remain largely unknown. We used a combination of behavioral assays and RNA interference (RNAi) to identify a gene required for the reproductive division of labor between the queen and the workers.