Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Cycle of Sexual Reproduction. Sexual reproduction involves the production of haploid gametes by meiosis. This is followed by fertilization and the formation of a diploid zygote. The number of chromosomes in a gamete is represented by the letter n. Why does the zygote have 2n, or twice as many, chromosomes?. Answer: meiosis
A:
Sexual reproduction involves the production of haploid gametes by what?