The manipulation of an organism's genetic makeup using a set of technologies for producing a novel organism with improved characteristics is under the domain of genetic engineering. Genes can be introduced, modified or knocked out, through the methods of recombinant DNA and artificial DNA synthesis. Gene delivery, gene isolation and cloning are some of the stages in the genetic engineering of organisms. This field has immense significance in the areas of industrial biotechnology, agriculture, medicine, etc. This book is compiled in such a manner, that it will provide in-depth knowledge about the properties, structures and functions of DNA. Also included herein is a detailed explanation of the various concepts and applications of genetic engineering. This textbook, with its detailed analyses and data, will prove immensely beneficial to professionals and students involved in this area at various levels.