<P> At the park's visitor center, the group learns that the cloning was accomplished by extracting dinosaur DNA from mosquitoes that had been preserved in amber . DNA from frogs was used to fill in gaps in the dinosaur genomes . To prevent breeding, all the dinosaurs were made female . Malcolm scoffs at the idea of such controlled breeding, declaring it will inevitably break down . The crew witness the birth of a baby raptor and visit the raptor enclosure . During a luncheon, the group debates the ethics of cloning and the creation of the park, with Dr. Malcolm giving a harsh warning about the implications of genetic engineering as a whole . </P> <P> The group is then joined by Hammond's grandchildren, Lex and Tim Murphy, for a tour of the park, while Hammond oversees the trip from the park's control room . The tour does not go as planned, with most of the dinosaurs failing to appear and the group encountering a sick Triceratops . The tour is cut short as a tropical storm approaches Isla Nublar . Most of the park employees evacuate on a boat to the mainland while the visitors return to their electric tour vehicles, except Sattler who stays with the park's veterinarian to study the Triceratops . </P> <P> Jurassic Park's lead computer programmer, Dennis Nedry, has been bribed by Dodgson, a man working for Hammond's corporate rival, to steal valuable fertilized embryos . Nedry deactivates the park's security system to gain access to the embryo storage room where he stores the embryos inside a canister disguised as Barbasol shaving cream, supplied by Dodgson . Because of Nedry, the power goes out and the tour vehicles become stuck . Most of the park's electric fences are deactivated as well, allowing the Tyrannosaurus to escape and attack the tour group . Grant, Lex, and Tim escape, while the Tyrannosaurus injures Malcolm and devours Gennaro . On his way to deliver the embryos to the island's docks, Nedry becomes lost in the rain, crashes his Jeep Wrangler, and is killed by a Dilophosaurus . </P> <P> Sattler assists the park's game warden, Robert Muldoon, in a search for survivors, but they only find an injured Malcolm, before the Tyrannosaurus returns . Grant, Tim, and Lex take shelter in a treetop . Later, they discover the broken shells of dinosaur eggs . Grant concludes that the dinosaurs have been breeding, which occurred because of their frog DNA--West African bullfrogs can change their sex in a single - sex environment, allowing the dinosaurs to do so as well, proving Malcolm right . </P>

What happened to the first island in jurassic park