DNA is the basis of all of human life. Within DNA are sequence of 4 nucleic acids. These nucleic acids (Guanine, Cytosine, Tyrosine, Adenine) are the basis of your hair, skin, brain, and everything you are made of.
During development DNA sequences are used to show gene expression. These gene are located in the same region of a chromosome for all people. You gets about half from your mom and half from your dad. These sequences are copied from a series of reactions and eventually folded into a protein. This protein can be used to make the structure or your hair or it can be used in a catalytic or metabolic reaction to complete bodily function. DNA is so simple yet so complex. So admire its helical shape in all of its glory.