Crake’s father dies when Crake is very young. The story is that he fell off an overpass, but Crake believes his father knew about and objected to the common corporate practice of introducing disease into the population in order to profit off the cure, and was subsequently killed (or “eliminated”).
The timeline below shows where the character Crake’s father appears in Oryx and Crake. The colored dots and icons indicate which themes are associated with that appearance.
...Jimmy he can be trusted. Seemingly to make Jimmy feel better, Crake tells him that Crake's own father had also left under similar circumstances, and died after going over a highway overpass. Crake... (full context)
...and releasing them into the population in order to sell the cures—because “illness isn’t productive.” Crake's father , Crake then reveals, was pushed off an overpass because he had found out about... (full context)