¬ DNA is o¬ne of the nucleic acids, information-containing molecules in the cell. DNA is found in the nucleus of every human cell. The information in DNA guides the cell in making new proteins that determine all of our biological traits. DNA is passed or copied from one generation to the next. The key to all of these functions is found in the molecular structure of DNA. Although it may look complicated, the DNA in a cell is really just a pattern made up of four different parts called nucleotides. Imagine a set of blocks that has only four shapes, or an alphabet that has only four letters. DNA is a long string of these blocks or letters. Each nucleotide consists of a sugar bound on one side to a phosphate group and bound on the other side to a nitrogenous base. These are connected in a double helix shape. The separation between phenotype and genotype is the knowledge and understanding of an organism’s development and heredity. When we talk about the genotype of an organism, it just means the class to which that organism belongs. This is mainly determined by the material that is passed on to the organisms from its parents. The phenotype is the process of determining which class an organism belongs to by the description of physical and behavioral characteristics. The difference of the two is made by the separation of casual pathways that lead to the way to information of organisms between successive