Genes are made up of DNA. Genes are functional units of heredity as they are made of DNA. It is a subdivision of DNA and is mainly passed down from parents to their children. Genes are generally organized and packaged in components called chromosomes.
DNA is a biomolecule made out of two long, twisted strands, containing complementary genetic information. These strands of DNA holds the blueprint for all living organisms.DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria. The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. DNA is made of nucleotides. Genes are made up of unique segments of DNA.