- "The idea of living creatures being numbered like software, being subject to updates and revisions, troubled Grant. He could not say why—it was too new of a thought—but he was instinctively uneasy about it. After all, they were living creatures..."
- —Jurassic Park novel(src)
Genetic versioning is a concept that has only been confirmed to have existed in the novels. It is the term given for when the genome of InGen's cloned dinosaurs and Cearadactylus are modified to remove glitches in their DNA, essentially like updating a software program, and each "updated" species is given a version number, such as 3.1 or 4.3. However, just because a clone was the latest version did not necessarily mean that it was held in Jurassic Park, as Othnielia had been updated past Version 3.1 yet Version 3.1 was residing at the park within the time frame the InGen Incident occurred. By the time of the InGen Incident, most of the dinosaurs were either Version 4.1 or 4.3 with Version 4.4 being considered. During the Tour of Jurassic Park Dr. Henry Wu proposed to John Hammond to update the clones to Version 4.4. In this proposal, Dr. Wu wanted the dinosaurs genetically modified to be slower and domesticated, because despite the cloned dinosaurs being close to what they actually were in life, Dr. Wu felt that visitors might find them unconvincing due to how fast they moved. Despite his proposal, Hammond did not approve of Version 4.4 as he wanted the dinosaurs to be real and felt that they were good enough.