Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: Binary fission occurs when a parent cell splits into two identical daughter cells of the same size. Answer: binary fission
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
What occurs when a parent cell splits into two identical daughter cells of the same size?