A genome is all the genetic information of an organism or cell. [1] . It consists of nucleotide sequences of DNA (or RNA in RNA viruses).
An organism's complete set of DNA is called its genome. Virtually every single cell in the body contains a complete copy of the approximately 3 billion DNA base pairs, or letters, that make up the human genome.
Human genome, all of the approximately three billion base pairs of deoxyribonucleic acid (DNA) that make up the entire set of chromosomes of the human organism.