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NEETZoologyBiotechnology and Its Applications

To protect a transgenic cotton crop specifically against the cotton bollworm, which of the following specific gene combinations should be introduced into the plant?

Options

  1. AcryIAb and cryIIAb
  2. BcryIAc and cryIIAb
  3. CcryIAc and cryIAb
  4. DcryIAb and nematode-specific genes

Correct answer

B. cryIAc and cryIIAb

Step-by-step solution

The proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworm. The gene cryIAb controls the corn borer, making options containing it incorrect for cotton bollworm. Nematode-specific genes are introduced to provide resistance against nematodes like Meloidogyne incognita via RNA interference, not to control insect pests like the cotton bollworm. Answer: cryIAc and cryIIAb

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