Question

Name the gene in the spores responsible for control of pest.

Hint:

Note the distinction: \textit{cryIAc} and \textit{cryIIAb} control cotton bollworms, while \textit{cryIAb} controls corn borer.

Answer 1

Step 1: Understanding the Concept: 
Bacillus thuringiensis (Bt) produces protein crystals that contain a toxic insecticidal protein. This protein is encoded by genes called cry genes. 
Step 2: Detailed Explanation: 
The spores of Bt contain crystalline protein inclusions. The synthesis of these proteins is controlled by the cry genes. 
Different cry genes target different pests. Specifically, for the corn borer, the gene is cryIAb. 
Step 3: Final Answer: 
The gene is the cry gene.