Genetics deals with the gross structure, organization, replication, recombination, functional regulation and transmission of heritable information in the biological organisms and also includes studies on the environmental factors affecting the genetic composition and evolution of biological organisms. Studies in genetics range from basic molecular genetics to large scale genomics at organism level. Molecular biology focuses on immunology, microbiology, genetics and cellular and sub-cellular biology. Studies on deciphering the structure and function of genetic materials, proteins and other metabolically active biochemical entities forms the fundamentals of genetic & molecular biology which find immense relevance in effective and accurate treatment of disease, increased crop production to meet the demands. Genetic engineering is the latest evolutionary product of the field which focuses on construction of genetically modified organisms.