Class Notes‎ > ‎Cells and Reproduction‎ > ‎Meiosis‎ > ‎

Group 3 Seonho Choi, Lyn, Roberto Morales, and Abnom

Meiosis is a type of cell division that is used for sexual reproduction that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores. For females four eggs are produced, but only one of them, the best one is used for reproduction. For males, all of them are used.
 There are two meiosis processes going on during cell division: meiosis l and meiosis ll, so 12 stages of meiosis in total: Interphase l, prophase l, metaphase l, anaphase l, telophase l/cytokinesis, prophase ll, metaphase ll, anaphase ll, telophase ll. The first meiosis is used to separate a diploid cell into two haploid and those two cells are also divided to produce 4 daughter cells in total through meiosis ll.
 Meiosis l has mutiple steps to go through. Interphase is the phase of the cell cycle in which a typical cell spends most of its life. During this phase, the cell copies its DNA in preparation for mitosis. Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. Metaphase is the third phase of mitosis, the process that separates duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During metaphase, the cell's chromosomes align themselves in the middle of the cell known as metaphase plate. Anaphase is the fourth phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. it is also shortest phase in meiosis process. Telophase is the final phase of cell division, between anaphase and interphase, in which the chromatids or chromosomes move to opposite ends of the cell and two nuclei are formed. Cytokinesis is the cytoplasmic division of a cell at the end of mitosis or meiosis, bringing about the separation into two daughter cells. Telophase and cytokinesis represent the end of the meiosis l process.



Meiosis ll is bascially the same thing as meiosis l, except that this process is used for the two haploids that were from the diploid from meiosis l. Eventually, these processes will produce 4 daughter cells in total and they would be used for the reproduction.
 
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