|A service of the U.S. National Library of Medicine®|
What is a genome?
A genome is an organism’s complete set of DNA, including all of its genes. Each genome contains all of the information needed to build and maintain that organism. In humans, a copy of the entire genome—more than 3 billion DNA base pairs—is contained in all cells that have a nucleus.
For more information about genomes:
The U.S. Department of Energy Office of Science provides background information about the human genome in its fact sheet The Science Behind the Human Genome
The Wellcome Trust Sanger Institute offers basic and in-depth explanations of the