Biotechnology has achieved the rare feat of combining all living organism - plants, animals and microorganisms, into a single gene pool. Genes can now be transferred across phylogenetic boundaries giving man unlimited power to tailor them to his choice. This has made biotechnology indispensable in such diverse fields as industry, medicine, forestry, and environmental management. Yet we say that we have the technology to manipulate genes, we can engineer genes. True it is in very limited sense. This book is primarily aimed to cover information on principles, tools, techniques, and applications of genetics that are developed in the last 50 years."Transgenic organisms" not only presents key concepts in genetic engineering but also examines the far reaching social, ethical and environmental issues raised by this evolving field.