Question

Name the source and the types of cry genes isolated from it for incorporation into crops by biotechnologists. Explain how have these genes brought beneficial changes in the genetically modified crops.

Answer 1

Source of cry gene is Bacillus thuringiensis.

The following type of cry genes are isolated from it: cryIAc, cryIIAb, cryIAb.

The introduction of cry gene acts as biopesticide. The cry gene produce crystals of toxic insecticidal protein. The activated toxin causes death of the insect.