| Organism | Type | Genome size (Mb) | Number of genes | Comment |
|---|---|---|---|---|
| Haemophilus influenzae | Bacterial | 1.83 | 1850 | The first genome of a free-living organism. 1995 |
| Escherichia coli | Bacterial | 4.64 | 4289 | The most studied bacterium. 1997 |
| Rickettsia prowazekii | Bacterial | 1.11 | 834 | The first genome to be sequenced in Sweden (Siv Andersson, Uppsala). 1998 |
| Methanococcus jannaschii | Archaeal | 1.66 | 1750 | The first sequenced Archaea. 1996 |
| Saccharomyces cerevisiae | Eukaryote | 12.1 | 6294 | The first sequenced eukaryote. 1997 |
| Caenorhabditis elegans | Eukaryote, nematode | 97 | 18,424 | The first sequenced multicellular organism. 1998 |
| Drosophila melanogaster | Eukaryote, insect | 137 | 13,601 | Celera Corp, publicly available. 2000 |
| Arabidopsis thaliana | Eukaryote, plant | 125 | 25,498 | The first plant. 2000 |
| Homo sapiens | Eukaryote, primate | 3,000 | ~30,000 | Not quite finished. Celera Corp, HGP, 2001. |