The protein products of the following Bt toxin genes cry I Ac and cry II Ab are responsible for controlling

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Bt cotton is a genetically modified pest-resistant plant cotton variety, that produces an insecticide or toxin to kill Pink bollworm. Bt toxin genes are formed during the sporulation of bacterium Bacillus thuringiensis. Bt gene produces proteins (cry I Ac and cry II Ab) form a crystal that is toxic to insects like Pink bollworm and harmless to humans.

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