The average reader is deluged continually with a quantity of facts in the field that we call genetics. A possible aid to the solution of this problem is the compilation of a volume, which endeavors to explain to the ordinary reader terms which are new to him and which have not yet become part of his general vocabulary. This volume attempts in brief compass to cover broadly the whole realm of genetics. Many words from fields closely related to genetics are included because of their wide usage in genetics literature. This volume covers an enormous range of technical terms from both pure and applied Genetics; this superb reference goes beyond basic definitions to provide helpful explanations and example. All aspects of genetics and genetic engineering are presented in accurage, easy-to understand terms. The aim of this volume is to provide a concise repository of number of major concepts in this field.