Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. Meiosis usually involves two distinct divisions called meiosis i and meiosis ii. By the end of meiosis, a single diploid cell has produced four haploid cells. After interphase i, the cell begins to divide, and the chromosomes pair up. In prophase i of meiosis, each replicated chromosome pairs with its corresponding homologous chromosome. This pairing forms a structure called a tetrad, which contains four chromatids. As the chromosomes pair, they sometimes undergo a process called crossing-over. Sc. 912. L. 16. 14 which is a true statement of crossing-over?.