mitosis vs. meiosis

mitosis vs. meiosis

Mitosis, meiosis, and sexual reproduction are discussed at . Click image to the left or use the URL below. URL: Both mitosis and meiosis result in eukaryotic cells dividing. So what is the difference between mitosis and meiosis? The primary difference is the differing goals of each process. The goal of mitosis is to produce two daughter cells that are genetically identical to the parent cell, meaning the new cells have exactly the same DNA as the parent cell. Mitosis happens when you want to grow, for example. You want all your new cells to have the same DNA as the previous cells. The goal of meiosis, however, is to produce sperm or eggs, also known as gametes. The resulting gametes are not genetically identical to the parent cell. Gametes are haploid cells, with only half the DNA present in the diploid parent cell. This is necessary so that when a sperm and an egg combine at fertilization, the resulting zygote has the correct amount of DNAnot twice as much as the parents. The zygote then begins to divide through mitosis. Pictured below is a comparison between binary fission (Figure 1.1), which is cell division of prokaryotic organisms, mitosis, and meiosis. Mitosis and meiosis are also compared in the table that follows (Table 1.1). A comparison between binary fission, mi- tosis, and meiosis. Purpose Number of Cells Produced Rounds of Cell Division Haploid or Diploid Daughter cells identical to parent cells? Daughter cells identical to each other? Mitosis To produce new cells 2 1 Diploid Yes Meiosis To produce gametes 4 2 Haploid No Yes No

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