Cell Division
I. What is the Cell Cycle
The cell cycle is a cycle in which a cell undergos to help it to grow or to help it reproduce. It begins in the G1 phase which is where most of the growing that will happen to the cell occurs. Once done growing in this phase then it will prepare for the synthesis and duplication of the DNA. Then the cell moves to the S phase which is where the chromosomes will be replicated via the DNA. After replication of the chromosomes then it moves to the G2 phase. This is where all the necessary organelles and the molecules begin to form and then are produced the cell also grows again. The M phase is where the process of the cell division occurs (mitosis). Below will state each phase of mitosis and what occurs during each of those phase.
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II. What is MitosisMitosis is a phase when the cells divide, and it takes place in four phases. Those phases are prophase, metaphase, anaphase, telophase. Prophase is the first and longest phase that is done in mitosis. This is when the chromatins condense and become chromosomes, that will separate to become chromosomes, and they will become visible. Metaphase is the chromosomes are now lining up exactly across from each other after having been split up into two groups, they are then connected by spindles from the centrioles. Anaphase is when the chromosomes split apart become sister chromosomes and move away from each other. Telophase is when the chromosomes are at opposite ends lose their shapes and a nuclear envelope comes. The end result is two Diploids.
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IV. Mitosis vs MeiosisMitosis and Meiosis are not the same thing. Mitosis is for the replication of a the damaged cell. For example if you got scraped your knee from falling you would want Mitosis to occur because it replicates and replaces that same cell to look like it did before it was scraped. With the end result of Mitosis you end up having 2 diploid cells.However with Meiosis this would occur if you're growing, or for reproducing. Therefore this occurs when an animal or mammal is going to reproduce. The chromosomes get split in half because you would get some from the dad and the other half from the mom. The end result would be having four haploid cells. To add on, with meiosis you're going to have the creation of homologous chromosomes and the crossing over of chromatins.
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