Final answer:
The human reproduction cycle involves the production of haploid gametes through meiosis, followed by fertilization to form a diploid zygote with twice as many chromosomes.
Step-by-step explanation:
The human reproduction cycle involves the production of haploid gametes through meiosis, followed by fertilization to form a diploid zygote. Haploid gametes have half the number of chromosomes (represented by the letter n) compared to diploid cells. The zygote, resulting from the fusion of two haploid gametes, has 2n or twice as many chromosomes as the gametes.