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Types of asexual reproduction

Types of asexual reproduction

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  • 1. How do cells make new cells?
    • Do You know:
    • What happens when you cut a worm in half?
    • Why do you think you can grow new skin over a cut on you hand but you can’t grow new fingers?
  • 2. What is reproduction?
    • Reproduction is the process by which
    • organisms produce more of their own kind.
    • Think about it – Without reproduction, all life on earth would no longer exist.
  • 3. What is Asexual Reproduction?
    • Only one parent is involved.
    • Offspring are genetically identical to their parents.
    • Creates no genetic variation.
    • All cells that come from a single cell are genetically identical to it and to each other; they are all clones .
  • 4.
    • Mitosis - is the exact duplication of the nucleus of a cell so as to form two identical nuclei during cell division.
    • It occurs in somatic cells (body cells). Function is for growth and repair of tissue.
    Types of Division during Asexual Reproduction
  • 5. Parent divides to form two new daughter cells
  • 6.
    • Binary Fission –
    • Many, but not all, single-celled organisms (unicellular), such as bacteria , and protists , reproduce asexually through binary fission .
    Types of division during Asexual Reproduction
  • 7.
    • Such Protists include, amoeba’s and paramecium.
    • The nucleus divides by binary fission and the cytoplasm divides, forming 2 new cells of equal size.
    Binary Fission
  • 8. Amoebas reproduce asexually by binary fission . A parent cell divides (the nucleus also divides in a process called fission) and produces two identical copies of itself.
  • 9. Bacteria dividing by binary fission
  • 10. Types of Asexual Reproduction
    • Budding
    • Some cells split via budding (for example baker's yeast),
      • The buds grow into fully matured individuals which eventually break away from the parent animal
  • 11.
    • Seen Mostly in Marine Animals and Yeast
      • Examples Include; Sponges, Corals and Jellyfish…
  • 12.  
  • 13. Some starfish can reproduce sexually and asexually. The starfish below has legs that are uneven because they have broken off in the process of asexual reproduction.
  • 14. YouTube - Sea Star Regeneration
    • Watch the video clip to see starfish regeneration.
    • This shows 2 new limbs starting to bud.
    • The old limbs that fell off will regenerate into 2 new starfish genetically identical to the parent.
  • 15. Budding in Hydra
  • 16. The video link below will show a hydra in the process of budding. YouTube - Hydra
  • 17.
    • Vegetative Propagation –
    • found in plants where new independent individuals are formed without the production of seeds or spores
    • Example – fragmentation, where small fragments of the plant develop into a new plant
    Types of Asexual Reproduction
  • 18.  
  • 19. Iris Rhizomes (roots) can be cut and a new plant will grow.
  • 20. Spider plants send out runners that can cut be planted. The new plant is a clone of the parent .
            • Adult Plant Detached Runners