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DNA DNA Your DNA is like your thumbprint. It is yours and yours alone. Unless you have an identical twin, no one else on the planet has exactly the same DNA as you. In the nucleus of almost every cell in your body is the collection of DNA needed to make you. DNA is found in the nucleus of chromosomes that are called your "genome." In each chromosome, the DNA is grouped into "genes." Your genome contains about 35,000 genes. Each gene carries information that tells the cell to make a unique protein that will perform a special function. Check that you understand what these words mean in this document Thumbprint: a mark made by the finger. Nucleus: a cell part that is characteristic of all living things. Chromosome: A physically separate molecule that is made up of DNA. Unique: the only one of its kind.