is the process of determining the perfect order of nucleotides within a DNA molecule. It includes the determination of the order of four bases—adenine, guanine, cytosine, and thymine—in a strand of DNA. The advancements in DNA sequencing methods has vastly improved biological and medical research and discovery. DNA sequencing
may be used to determine the sequence of entire genomes. Sequencing provides the order of individual nucleotides in present in molecules of DNA or RNA isolated from animals, plants, bacteria, archaea, or virtually any other source of genetic information. This information is useful to various fields of biology and other sciences, medicine, forensics, and other areas of study.