The difference in DNA found among individuals is known as genetic variation. These genetic differences found in individuals and populations forms the basis of human biological variations. The field focuses on identifying the various biological causes that lead to these variations in humans. Some of these include the order of bases in nucleotides present in the genes, variation in enzymes and variation in discrete and quantitative traits. The technique of protein electrophoresis is used to examine the variations in enzymes. Mutation, genetic recombination and segregation are some of the causes of genetic variation studied within this discipline. This book is a valuable compilation of topics, ranging from the basic to the most complex advancements in the field of human biological variations. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail herein. This book is a vital tool for all researching or studying this discipline as it gives incredible insights into emerging trends and concepts.