Mitosis and meiosis

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Mitosis and meiosis

  1. 1. Mitosis and Meiosis Higher Biology
  2. 2. Mitosis and Meiosis• Mitosis: -division of somatic (body) cells• Meiosis -division of gametes (sex cells)
  3. 3. Mitosis• Interphase• Prophase• Metaphase• Anaphase• Telophase
  4. 4. Interphase• Interesting things happen!2. Cell preparing to divide3. Genetic material doubles
  5. 5. Prophase• Chromosome pair up!2. Chromosomes thicken and shorten -become visible -2 chromatids joined by a centromere• Centrioles move to the opposite sides of the nucleus• Nucleolus disappears• Nuclear membrane disintegrate
  6. 6. Metaphase• Chromosomes meet in the middle!• Chromosomes arrange at equator of cell• Become attached to spindle fibres by centromeres• Homologous chromosomes do not associate
  7. 7. Anaphase• Chromosomes get pulled apart2. Spindle fibres contract pulling chromatids to the opposite poles of the cell
  8. 8. Telophase• Now there are two!2. Chromosomes uncoil3. Spindle fibres disintegrate4. Centrioles replicate5. Nucleur membrane forms6. Cell divides
  9. 9. Meiosis• 4 daughter cells produced• Each daughter cell has half the chromosomes of the parent• 2 sets of cell division involved
  10. 10. This powerpoint was kindly donated towww.worldofteaching.comhttp://www.worldofteaching.com is home to over athousand powerpoints submitted by teachers. This is acompletely free site and requires no registration. Pleasevisit and I hope it will help in your teaching.

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