This sixth edition of the classic addresses the need of students andprofessionals to have access to an up-to-date reference source that not onlydefines the most recently coined terms, but in many cases also presentsimportant ancillary encyclopedic information. The text has a very broad range,including definitions of strictly genetic words along with a variety ofnon-genetic terms often encountered in the literature of genetics. There areabout 70,000 definitions with tables and drawings to illustrate some. There arealso Appendices featuring the classification of living organisms; a chronologyof the discoveries and inventions that have led to advances in genetics, cellbiology, and the study of evolution; a bibliography of useful books; and alisting of internet sites and databases relevant to genetics and molecularbiology.