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The human genome is a full collection of nucleic acid sequences for humans, encoded as DNA in cell nuclei's 23 chromosomal pairs and as tiny DNA molecules in each mitochondrion.

The Human Genome Project and Celera Corporation presented the first human genome sequences in almost full draught form in February 2001.

The human genome is around 3 billion base pairs long in total. The genome is divided into 22 pairs of chromosomes known as autosomes, as well as the 23rd pair of sex chromosomes known as XX in females and XY in males. These are all big linear DNA molecules found in the nucleus of the cell.

Thus, the human genome, like those of all other cellular life forms, is made up mostly of DNA, however, a few viruses have RNA genomes. DNA and RNA are polymeric molecules composed of nucleotide chains, which are monomeric components.