Types of Cell Division

Types of Cell Division - haploid (N), then the daughter...

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Types of Cell Division A cell divides by pinching into two. Each of two daughter cells produced contains genetic material inherited from the original (parent) cell. Why Divide? Single-celled organisms divide to reproduce. Cell division in multicellular organisms enables the organism to grow larger while the cells remain small. A large surface:volume ratio is due to small cell size. Organisms with many cells can have cells which are specialized for different functions and tasks. For example, red blood cells are specialized for carrying oxygen but neurons (nervous tissue) are specialized for conducting signals from one cell to another. Some cells of multicellular organisms must divide to produce sex cells (gametes). Mitosis Mitosis produces two daughter cells that are identical to the parent cell. If the parent cell is
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Unformatted text preview: haploid (N), then the daughter cells will be haploid. If the parent cell is diploid, the daughter cells will also be diploid. N N 2N 2N This type of cell division allows multicellular organisms to grow and repair damaged tissue. Meiosis Meiosis produces daughter cells that have one half the number of chromosomes as the parent cell. 2N N Meiosis enables organisms to reproduce sexually . Gametes (sperm and eggs) are haploid. Meiosis is necessary in sexually-reproducing organisms because the fusion of two gametes (fertilization) doubles the number of chromosomes. Meiosis involves two divisions producing a total of four daughter cells. Click here to go to the chapter on meiosis....
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