The applications of genetic engineering are now so widespread and well established within the biomedical sciences that it is difficult for younger investigators to envisage what research life was like in the era before genetic engineering. This book contains state of the research and developments insight into the modern tools of genome editing, their hurdles and their huge potential. Classical field of genetic engineering and some of its advancements are discussed in this book. Complex studies are being carried out around the world independently to evaluate the advantages and disadvantages of GM foods. The book attempts to summarize up-to-date knowledge about the benefits and potential problems of GM food. This book also introduce some recent technological developments in GM foods and their impact in the field.