How did Vincent circumvent the genetic testing at GATTACA?

Vincent circumvented the genetic testing at GATTACA by using a vial of Jerome's blood. This is significant because Jerome, who was genetically engineered to be superior, had a different genetic makeup than Vincent, who was naturally conceived. By substituting his own genetic material with Jerome's through the blood sample, Vincent was able to pass the rigorous genetic screenings designed to exclude individuals like him, who were considered "invalids." This clever tactic allowed him to navigate a system that was heavily biased against natural births and enabled him to pursue his ambitions within a society that valued genetic perfection above all. The use of Jerome's blood highlights the lengths to which Vincent was willing to go to achieve his dreams, showcasing themes of identity and the struggle against genetic determinism in the narrative.