The organisms whose genetic traits are changed using the genetic engineering techniques are known as genetically modified organisms. These organisms are better known as ‘transgenic organisms’ because using other genetic systems from different organisms alters their genetic system. The most commonly modified organisms are viruses, microbes, bacteria, cisgenic plants, transgenic plants, genetically modified crops, etc. This book elucidates the concepts and innovative models around prospective developments with respect to genetically modified organisms. Those in search of information to further their knowledge will be greatly assisted by it. Through this textbook, we attempt to further enlighten the readers about the new concepts in this field.