Question

Give different types of cry genes and pests which are controlled by the proteins encoded by the genes.

Answer 1

Cry genes:

1. They are homologous genes found in Bacillus thuringiensis that produce toxic molecules against specific pests and insects.
2. These toxic proteins are crystalline and help create pores and lyse midgut cells in insects.
3. Hence, this property was utilized in plants to create protection against pests and insects.
4. Different types of cry genes are, cry IAB, cry IAC, and cry IIAB.
5. Cry gene IAB protects corn from borer pests.
6. Cry gene IAC and cry gene IIAB regulates the action of bollworms that destroy the cotton plant.