Meiosis Notes

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Teaching our 8th graders about meiosis.

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Meiosis Notes

  1. 1. Chromosomes <ul><li>Chromosomes are passed on - along with the genes on the chromosomes - from parents to offspring. </li></ul><ul><li>If each parent contributed all chromosomes to an offspring, then the offspring would have twice as many chromosomes as the parents - twice the normal number of chromosomes. </li></ul><ul><li>This does not happen because of a process called MEIOSIS. </li></ul><ul><li>Chromosomes contain genes whose main function is to produce proteins. These proteins determine traits of an organism. </li></ul>Chromosome - determines traits (ie. hair color, shape of nose) Gene
  2. 2. Meiosis <ul><li>Meiosis is sexual reproduction. </li></ul><ul><li>Your body is made up of trillions of cells. </li></ul><ul><li>Most of those - including bone, muscle and skin cells - have 46 chromosomes in each nucleus. </li></ul><ul><li>Sex cells have 23 chromosomes each nucleus. </li></ul><ul><li>Meiosis is a type of cell division that produces sex cells (sperm or egg) with half as many chromosomes as body cells. </li></ul>
  3. 11. Final product - 4 sex cells 4 eggs or 4 sperm Each has half the chromosomes as the parent cell.

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