Gene and DNA are two terminologies used primarily in Genetics, basically, a gene is a section of DNA and DNA (Deoxyribonucleic Acid) is a molecule which carries the genetic instructions or the hereditary materials.

DNA is found inside the nucleus of a cell, where it forms the chromosomes. The chromosomes have proteins called histones that bind to DNA. DNA consists of two strands that twist into the shape of a spiral ladder called a helix. It is made up of four building blocks called nucleotides, namely , Adenine (A), Thymine (T), Guanine (G), and Cytosine (C). The nucleotides get attached to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands.

Genes, made up of sequences of DNA, are arranged one after another, at specific locations on chromosomes in the nucleus of cells. They contain the information for making specific proteins that lead to the expression of a particular physical characteristic or trait, such as hair color or eye color, or to a particular function in a cell. The genes are responsible for our unique physical characteristics.