how the BT cotton forms ?
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About ten years ago, Monsanto scientists inserted a toxin gene from the bacterium called Bt (which is the nickname for Bacillus thuringiensis) into cotton plants to create a caterpillar-resistant variety. ... The toxin kills caterpillars by paralyzing their guts when they eat it.
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The gene coding for Bt toxin has been inserted into cotton as a transgene, causing it to produce this natural insecticide in its tissues. In many regions, the main pests in commercial cotton are lepidopteran larvae, which are killed by the Bt protein in the genetically modified cotton they eat.
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