Why are all four daughter cells produced by meiosis genetically different from the parent cell and from one another?

1. In meiosis-I, crossing over occurs between homologous chromosomes. 2. This crossing over leads to genetic recombination. 3. Because of recombination, the four haploid daughter cells differ from the parent and from each other. 4. The fusing-chromatids option is wrong because chromatids separate, not fuse, so it is ruled out. 5. The doubled-chromosome option is wrong because meiosis halves the number to haploid, so it is ruled out. 6. The undivided-cytoplasm option is wrong because cytokinesis does occur to form four cells, so it is ruled out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 2 "Life Processes in Living Organisms Part 1", p.29_