Asexual reprod
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Asexual reprod

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Asexual reprod Asexual reprod Presentation Transcript

  • 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?
  • 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.
  • What is Asexual Reproduction?
    • Only one parent is involved.
    • Offspring are genetically identical to their parents.
    • All cells that come from a single cell are genetically identical to it and to each other; they are all clones.
    • Mitosis - is the exact duplication of the nucleus of a cell so as to form two identical nuclei during cell division.
    Types of Division during Asexual Reproduction
    • 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
    • Such Protists include, amoeba’s and paramecium.
    • The nucleus divides by mitosis and the cytoplasm divides, forming 2 new daughter cells of equal size.
    Binary Fission
  •  
  • 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
    • Seen Mostly in Marine Animals and Yeast
      • Examples Include; Sponges, Corals and Jellyfish…
  •  
  • Budding in Hydra
    • 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
  •