Genetic engineering is the science of using biotechnology to modify and improve organisms and enhance their characteristics. This field produces genetically modified organisms (GMOs), genetically modified food and genetically modified crops. It incorporates techniques like DNA sequence, gene transfer, genome editing, gene therapy, etc. This book includes contributions of experts and scientists which will provide innovative insights into this field. It also provides interesting topics for research which readers can take up. Different approaches, evaluations, methodologies and advanced studies on genetic engineering have been included in it. Scientists and students actively engaged in this subject will find this text full of crucial and unexplored concepts.