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.
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.
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.
The source is Bacillus thuringiensis. Types of crygenes cry IAc, cry IIAb, cry lAb. Changes caused by cry genes in GM crops: (i) The cry genes code for certain crystal proteins that have Bt toxin. (ii) Bt toxin exists as inactive protoxin and gets converted into active form (toxin) in the alkaline pH of the gut of the insect. (iii) The activated toxin binds to the epithelial cells lining the surface of the midgut and creates pores leading to swelling and lysis of the cells and ultimately cause death of the insect. (iv) This way GM crops show resistance against insect pests.
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.
Answers
Sheetal Parihar
The source is Bacillus thuringiensis.
Types of crygenes cry IAc, cry IIAb, cry lAb.
Changes caused by cry genes in GM crops:
(i) The cry genes code for certain crystal proteins that have Bt toxin.
(ii) Bt toxin exists as inactive protoxin and gets converted into active form (toxin) in the alkaline pH of the gut of the insect.
(iii) The activated toxin binds to the epithelial cells lining the surface of the midgut and creates pores leading to swelling and lysis of the cells and ultimately cause death of the insect.
(iv) This way GM crops show resistance against insect pests.