Biotechnology may be defined as ‘any technological application that uses biological systems, living organisms, or derivatives thereof to make or modify products or processes for specific use’. No matter what tools or techniques like DNA marker, gene manipulation, gene transfer, invitro culture, embryo transfer etc are used, biotechnology like any other technology must give rise to certain products, processes or innovative services. Genetic engineering is the pivot of modern biotechnology. Recombinant drugs like Insulin, Interferon, Growth hormone and a host of others have already been produced through bacterium like E. coli by inserting gene from human and animal sources. And in the advanced countries a revolution has already taken place with biotechnological products.