Genetics deals with genes, genetic variation, gene mutation and heredity with a heavy focus on inborn. Genetics is important because many of the diseases have their tuber in polymorphisms or mutations in gene. Molecular biology allows the study of gene functions, polymorphisms and mutations. Molecular Biology is difficulty coil. This field of biological sciences is a rapidly growing field which has a host of important applications not only in in biomedical sciences, but also in other areas.