CBSE Class 12 Biology — Biotechnology and its Applications

Assertion (A) : The milk produced by transgenic cow `Rosie' was nutritionally more balanced product for human babies than natural cow milk. Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

A farmer grew two varieties of corn crop in field A and B. He grew normal corn crops in field A and GM corn crops in field B. He observed that corn borers attacked only in field A. To control it, spores of Bt were sprayed on field A. (a) Name the gene in the spores responsible for control of pest. [½] (b) What effect will the spores of Bt have on insect pest? [1½] (c) How has corn plants of field B developed resistance against this pest? Explain. [1]