The fourth edition of this well-known text provides students, researchers and technicians in the area of medicine, genetics and cell biology with a concise, understandable introduction to the structure and behavior of human chromosomes. It covers both basic and up-to-date material on normal and defective chromosomes. This new edition is particularly strengthened by the complete revision of the material on the molecular genetics of chromosomes and chromosomal defects. The mapping and molecular analysis of chromosomes is one of the most exciting and active areas of modern biomedical research, and this book will be invaluable to scientists, students, technicians and physicians with an interest in the function and dysfunction of chromosomes. From the reviews of the third edition: "Each word "tells" in this concise gem of a human cytogenetics text...Superb organization makes this an excellent text...for any cytogenetics course." American Journal of Human Genetics"...the leading textbook in English on human cytogenetics." Cell