Final answer:
The word that completes the sentence correctly is 'meiosis'. Meiosis is the process that reduces the chromosome number by half, creating four haploid daughter cells from one diploid cell through two rounds of cell division.
Step-by-step explanation:
After meiosis, the resulting daughter cells (gametes) are haploid(n) instead of diploid(2n). During the cellular division process of meiosis, one diploid cell undergoes two successive cell divisions, resulting in four haploid daughter cells. These cells have half the number of chromosomes of the original diploid cell and are genetically unique.
The stages of meiosis include Meiosis I and Meiosis II, each consisting of the phases: prophase, metaphase, anaphase, and telophase, followed by cytokinesis. This process ensures that when a haploid sperm cell (n) and a haploid egg cell (n) combine during fertilization, they form a diploid zygote with the correct number of chromosomes.