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17 Asexual Reproduction
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17 Asexual Reproduction

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Transcript

  • 1. Asexual Reproduction
  • 2. Reproduction without sex
    • Binary fission in prokaryotic microbes
    • Mitosis in the somatic cells of eukaryotes
    • Spore formation in fungi
    • Natural cloning in animals
      • Budding in sponges and corals
      • ‘ virgin births’ in insects
    • Vegetative reproduction in plants (eg. runners, cuttings and rhizomes)
  • 3. Binary fission in bacteria
    • Much faster than mitosis in eukaryotic cells
    • Takes approx. 20 mins as opposed to several hours
    • If resources were available once cell could become 16,000,000 in 8 hours!
  • 4. Binary Fission in bacteria
  • 5. Binary Fission in bacteria
  • 6. Binary Fission in bacteria
  • 7. Binary Fission in bacteria
  • 8. Binary Fission in bacteria
  • 9. Binary fission in bacteria
    • Bidirectional replication of circular DNA
    • DNA moves to poles
    • Cell elongates
    • Cleavage furrow forms
    • Cell divides
  • 10. Asexual reproduction in plants Parent Bud Runner Rhizome New frond

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