Board Thread:Movie discussion/@comment-194.83.57.1-20150630111757/@comment-17754282-20151019212132

124.190.240.43 wrote: Agreed. If Dr. Grant finding the eggs had been fleshed out AT ALL like it is in the book you would expect there to be another Rexy.

But the JP movie dropped that storyline VERY fast, so Sorna has three - the parents are shown with the juvenille at the end (although with Jurassic World, The Lost World may never have happened). Well, first of all there would not have been another Rexy because there was only one Tyrannosaur in the original park, and the issue surrounding breeding was that the dinosaurs could change from female to make if needed. As Rexy was the only Tyrannosaurus on Isla Nublar, her changing gender would have been pointless as there was nothing else for her to breed with.

Even in the books though, the issue of breeding was ruined by Crichton. Wu confirms that the only Dinosaurs to receive frog DNA were the ones known to have bred - Velociraptor, Procompsognathus, Othnielia, Hypsilophodon and Maiasaura - while the rest received DNA from lizard and birds. This is later ignored when two Dilophosaurus are seen performing a courting ritual while The Lost World drops this limitation completely by having the other dinosaurs, including Tyrannosaurus, breed without explanation