Final answer:
Haploid cells are produced from a single diploid cell during meiosis, leading to four genetically unique haploid daughter cells, used later in sexual reproduction.
Step-by-step explanation:
The correct answer to the question is that haploid cells are produced from a single diploid cell during meiosis. This process involves two cell divisions, meiosis I and meiosis II, ultimately resulting in four haploid daughter cells from the original diploid parent cell. Each of these haploid cells contains one set of chromosomes, which is half the number of chromosomes found in the diploid parent cell. During meiosis I, homologous chromosomes separate, leading to two haploid cells which then enter meiosis II. Here, sister chromatids separate, accounting for four genetically unique haploid daughter cells.
In the context of sexual reproduction, these haploid cells can develop into gametes. For instance, in humans, these gametes are sperm and egg cells. When fertilization occurs, a haploid sperm and a haploid egg combine to form a diploid zygote, which has two sets of chromosomes, one from each parent.