This book describes all the concepts, mechanisms and jargon of medical genetics in an easily accessible form suitable for students, doctors and scientists. There is an emphasis on understanding the normal human genome rather than listing genetic diseases. The traditional topics of pedigree interpretation and cytogenetics are thoroughly covered, but in a modern context of genes as functional DNA sequences with a particular map location. Medical genetic terms are set out in the style of the highly successful "Immunology:An Illustrated Outline" an earlier book in the series and can be used as a glossary or revision aid.