Genetics is difficult for students of agriculture and veterinary science to understand: the application of genetics to animal breeding can be even more difficult in practice. This textbook has been revised completely by a practical geneticist and breeder who fully understands the difficulties of students and stockmen. It explains the theoretical basis of Mendelism, population genetics, selection and breeding and their applications on the farm. The penultimate section concerns practical animal breeding and how to go about it, with examples and problems.