Mitosis and Meiosis Essay
Mitosis and Meiosis When going over the cell cycle, mitosis and meiosis are two major components - Mitosis and Meiosis Essay introduction. Mitosis is the division of the cell’s nucleus, and is followed by cytokinesis. Cytokinesis is the division of cytoplasm. Mitosis is only one phase that a cell goes through in the cell cycle. Also the mitotic phase is one of the shortest phases. Mitosis can be broken down into five different stages; prophase, prometaphase, metaphase, anaphase, and telophase. In prophase the nucleoli starts to disappear, and the mitotic spindle begins to form.
Also the duplicated chromosomes are identical sister chromatids that are connected at the centromeres. Prometaphase is where the nuclear envelope fragments. The chromosomes become more condensed, and some of the microtubules attach to the kinetochores. In metaphase is the longest stage that occurs in mitosis. The centrosomes are at opposite poles of the cell now. Also the chromosomes convene on a metaphase plate between the two poles. Anaphase is the shortest phase, where the two chromatids part.
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Now the two separate chromosomes move to opposite ends of the cell. By the end of anaphase the two ends of the cell have complete and equivalent set of chromosomes. Telophase is where the nuclei form in the cell, and nucleoli reappear. The chromosomes are less condense in this phase, and the cycle of mitosis is now complete followed by cytokinesis. Meiosis is cell division that reduces the number of sets of chromosomes from two to one in the gametes. It counterbalances the doubling that occurs at fertilization.
This single replication is followed by two consecutive cell divisions, meiosis I and meiosis II. There are the same four stages in each parts of meiosis. In meiosis I the prophase I the chromosomes begin to condense, and align gene by gene. Synapses ends midway through prophase, and chromosomes in each pair move apart. In metaphase I pairs of homologous chromosomes now arrange on the metaphase plate. Anaphase I the breakdown of proteins makes homolog’s to separate. They move to opposite poles.
In telophase I each cell has a haploid set of chromosomes. Also in animal cells a cleavage furrow forms. Prophase II a spindle forms. In metaphase II the chromosomes are positioned on the metaphase plate, and the kinetochores of sisters are attached to microtubules extending from opposite poles. Anaphase II is where the chromosomes separate due to the breakdown of proteins. The last phase is telophase II. The nuclei form and began condensing. The meiotic division of one parent cell produces four daughter cells.
Mitosis and Meiosis Essay
Mitosis and meiosis are both important to a living organism because they represent cell divisions that are very important to every living organism because without cell division all living organisms would fail to reproduce, eventually dying out - Mitosis and Meiosis Essay introduction. Cell division plays a very important role in the life cycle of a cell. Mitosis and meiosis are important to living organism because they help living organisms to grow, develop, and reproduce.
Mitosis is a type of asexual reproduction, which enables a cell to reproduce two new genetically identical daughter cells from a single parent cell. During the process, mitosis provides the necessary function of permitting cells to be replaced once they are worn out, damaged, or need to be replicated for single cell organism reproduction (Pruitt & Underwood, 2006). Meiosis is “the process by which certain sex cells are created” (Groleau, 2001). Meiosis occurs in a particular arrangement of one’s cells to create eggs and sperm.
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Meiosis involves the reproduction of two parent cells of a specific type to create four daughter cells, which have genetic material from both parent cells. Meiosis plays an important part in organism reproduction because it permits chromosomes of more complex organisms to be passed down from parent cells to daughter cells in a way that allows for an endless potential for genetic diversity. An organism needs to undergo the process of mitosis to repair damaged cells or to start a new cell life cycle through cellular division.
A cell need to be replaced on the regular basic within a living organism, the cells divide and create new cells. An organism would undergo the process of meiosis when it needs to produce cells designated for sexual reproduction, such as egg or sperm cells within humans. If meiosis did not occur, the reproduction of sex cells involving the combination of genetic information from two parent cells and the ability to create new cells, would have no way to happen.