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Mitosis and Meiosis
Meiosis, in contrast, occurs in gametes (sex cells), produces 4 genetically diverse daughter cells, and includes two divisions of genetic material. Meiosis is broken up into into two parts: meiosis I and meiosis II which each consist of 4 components. Meiosis I happens first right after DNA replication and consists of prophase I, metaphase I, anaphase I, and telophase I. Prophase I, significantly like prophase in mitosis, is when the chromosomes shorten and the mitotic spindle forms. However, in contrast to prophase in mitosis, the two genetically identical sister chromatids pair off, and crossing over happens between non sister chromatids. Crossing over is the very crucial explanation that no two people have the identical DNA. Metaphase I is quite comparable to metaphase in mitosis since the homologous pairs of chromosomes line up along the metaphase plate. In anaphase I, the homologous pairs of chromosomes are separated and pulled to opposite sides of the cell leaving the paired chromatids nevertheless collectively (textbook, 97).
Meiosis I outcomes in two genetically different haploid cells following telophase I and cytokinesis which are related to telophase and cytokinesis of mitosis. Meiosis II consists of prophase II, metaphase II, anaphase II, and telophase II. Prophase II is similar to prophase in mitosis, and no crossing over happens throughout prophase II. Metaphase II is when the sister chromatids line up along the metaphase plate. For the duration of anaphase II, the sister chromatids separate and move to opposite poles of the cell. The final step of meiosis is telophase II and cytokinesis exactly where the nuclear envelopes reform and four, genetically diverse haploid gametes are formed as a result of the original single diploid cell (textbook, 97).
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