Meiosis - 4. During prophase I of meiosis the four sister...

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Meiosis * Meiosis is the type of cell division that produces the sex cells or gametes.  During  meiosis a diploid cell undergoes two sets of divisions to produce up to four haploid cell.  Fertilization, which involves the joining of male and female gametes, restores the diploid  number of chromosomes.   Comparison of Meiosis and Mitosis   1. Meiosis is the process by which sex cells or gametes are formed, while mitosis is the  process by which all other cells of the body divide.   2. During meiosis a diploid cell divides to form up to four haploid cells; during mitosis a  diploid cell divides to form two genetically identical diploid cells.   3. Meiosis involves two series of divisions each of which has a prophase, metaphase,  anaphase, and telophase; while mitosis involves one series of divisions.
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Unformatted text preview: 4. During prophase I of meiosis the four sister chromatids formed from the original pair of homologous chromosomes remain connected to form a tetrad; whereas in mitosis each pair of sister chromatids migrates to the metaphase plate independently of one another. * Crossing-over of genetic information occurs when the sister chromatids are in the tetrad state. This increases genetic variability in the resulting cells. 5. The goal of meiosis is to produce genetically different cells that have half the number of chromosomes as the original cell; while the goal of mitosis is to produce two cells that are genetically identical to the parent cell....
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This note was uploaded on 11/18/2011 for the course BIOLOGY bi 101 taught by Professor - during the Fall '10 term at Montgomery.

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