Final answer:
Meiosis I produces two haploid daughter cells with one set of chromosomes each, differing from each other and the original diploid cell. In meiosis II, the sister chromatids separate, forming four genetically unique haploid gametes. This differs from diploid cells undergoing mitosis, which creates daughter cells with the complete set of chromosomes.
Step-by-step explanation:
Meiosis I results in two haploid cells, called daughter cells, each of which has one chromosome set, as it would after mitosis. Because each pair of homologous chromosomes was separated, neither daughter cell has the two complete sets of chromosomes that it would have in a diploid cell. The two cells produced by meiosis I have sets of chromosomes and alleles that are different from each other and from the diploid cell that entered meiosis I.
In some species, cells enter a brief interphase, called interkinesis, before entering meiosis II, which does not include an S phase, so chromosomes are not duplicated. Thus, during meiosis II, the sister chromatids within each haploid daughter cell separate, resulting in four haploid gametes. The mechanics of meiosis II are similar to mitosis, with the distinction that each cell has half the number of sister chromatids to separate as a diploid cell undergoing mitosis.