| Organism | Number of Replication Origins | Average Length of Replicon (bp) |
|---|---|---|
| Escherichia coli (bacterium) | 1 | 4,600,000 |
| Saccharomyces cerevisiae (yeast) | 500 | 40,000 |
| Drosophila melanogaster (fruit fly) | 3,500 | 40,000 |
| Xenopus laevis (frog) | 15,000 | 200,000 |
| Mus musculus (mouse) | 25,000 | 150,000 |