The primary motive for compiling and publishing this manual was to provide scientists, researchers, and students from national agricultural research systems, universities, and small private companies in developing countries, as well as advanced research institutions in the developed world, with a useful guide on the protocols currently in use in genetic engineering. This manual is intended to introduce you to some of the most widely used experimental procedures in biotechnology, including DNA isolation, manipulation, and cloning. You will also gain some familiarity with some of the types of equipment frequently used in biochemistry and molecular biology.The objective of this laboratory course is to provide you with hands-on experience in some of the basic, but essential laboratory skills required in molecular biology and biotechnology. Emphasis will be placed on understanding the concepts behind designing and implementing controlled experiments. The genetic engineering laboratory, like all laboratory courses, is an exploration of procedures. This means that, in order to get full benefit from the course, you will need to read the Manual; this reading will provide background information and an outline of the procedures to be performed. If you do not do this, you will find yourself wasting large amounts of class time, and annoying both your lab partners and your instructor. To encourage your understanding of the material, you will have problem sets that cover material related to the planned experiments. The genetic engineering laboratory is conducted as a directed research project. This means that although the general procedures are well established, the overall goal of each experiment is the acquisition of new information. Because of the nature of scientific research, predicting the outcome of experiments that have not previously been performed is difficult. It may therefore be necessary to design new experiments based on the results of previous ones, or to repeat experiments that yielded ambiguous results. On the other hand, if you approach the course will an open and flexible mindset, you will learn how research is performed in a genetic engineering laboratory.