After graduating from high school, Crake attends the highly respected Watson–Crick Institute, where he studies advanced bioengineering, but Jimmy ends up at the loathed Martha Graham Academy, where students study humanities, only valued for their propaganda applications. Jimmy gets a job writing ad copy, while Crake becomes a bioengineer at RejoovenEsense. Crake uses his prominent position to create the Crakers, peaceful, gentle, herbivorous humanoids, who have sexual intercourse only during limited polyandrous breeding seasons. His stated purpose for the Crakers, actually a deliberate deception, is to create "floor models" of all the possible options a family could choose in the genetic manipulation of their future children. Crake's bio-engineering team consists of the most expert players gathered from the online "Extinctathon" community.