Des Nicholl presents here a new, fully revised, and expanded edition of his popular undergraduate-level textbook. Many of the features of the original edition have been retained; the book still offers a concise technical introduction to the subject of genetic engineering. However, the book is now divided into three main sections: the first introduces students to basic molecular biology, the second section explains the methods used to manipulate genes, and the third deals with modern applications of genetic engineering. A whole chapter is now devoted to the polymerase chain reaction. Applications covered in the book include genomics, protein engineering, gene therapy, cloning, and transgenic animals and plants. A final chapter discusses the ethical questions surrounding genetic engineering in general. An Introduction to Genetic Engineering is essential reading for undergraduate students of biotechnology, genetics, molecular biology and biochemistry.