What method does Vincent use to adopt a new identity in GATTACA?

Vincent adopts a new identity in "GATTACA" primarily by using the bodily fluids and fake identification of a genetically valid person, which allows him to bypass the society's stringent genetic discrimination. This method involves him taking on the identity of Jerome Eugene Morrow, a genetically elite individual. By using Jerome's blood, urine, and hair, Vincent can fool the biometric security systems in place, which are designed to detect genetic profiles. This method highlights the film's central themes of identity and the societal obsession with genetic perfection. The use of bodily fluids is particularly significant as it emphasizes the lengths to which Vincent must go to escape his predetermined fate as an "in-valid," showcasing the extreme measures taken in a world that values genetic identity above all else.