Solve a and b.

Dear Student.
Please find below the solution to the asked query.

 Cry1Ab is a gene from Bacillus thuringiensis. This gene provides resistance against insects and pests.

a.  A corn borer (Ostrinia nubilalis) is an insect belonging to the order lepidoptera. It is a common pest of grains especially corn and maize. It feeds on and damages various plant parts like leaf tissue, kernels, ears of corn and stalk. Infestation causes serious damage to both the quality and quantity of the crops.

Cry1Ab can be introduced in many plants by the help of techniques involved in biotechnology. For example when it is introduced in the cotton plant, the insects that feed on the plant and cause yield loss, stops eating and dies. The gene can be transmitted to the next generation of plants by successive sexual reproduction. The gene damages the lepidopteran insects by damaging their midgut lining​.

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