Cytokinesis is the separation of plasma and organelles between each daughter cell so that it has what it needs to survive.
In meiosis I, the cells begin as diploid and become haploid. At the end of replication they only have one original copy of each chromosome, while the original cell had two distinct copies of chromosomes (two alleles).
In meiosis II, the cells begin as haploid and stay haploid. The original parent cell had one pair of sister chromatids for each chromosome (1-23), but did not have a pair from each parent. Thus, the original cell had double the amount of genetic material in two identical copies. When those identical copies are split into two daughter cells, they too only have information from one parent, indicating a haploid to haploid division.
In mitosis, cells that started out as diploid remain diploid, meaning they still have genetic information from both parents. This is because homologous chromosomes are not paired in prophase and are lined up individually on the metaphase plate, resulting in both daughter cells getting two separate copies of genes.
Chromatin is condensed into chromosomes for replication and separation, but they now begin to decondense back into chromatin. The condensing of chromatin into chromosomes during mitosis facilitates easier transportation and attachment of mitotic spindles to the kinetophores.
The nuclear membrane reforms in each almost-separated daughter cell around the set of chromosomes. Nucleoli also re-appear.
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