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Asexual Reproduction . Advantages and Disadvantages. Binary Fission. Bacteria reproduce by a process called binary fission

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Asexual Reproduction

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asexual reproduction

Asexual Reproduction

Advantages and Disadvantages

binary fission
Binary Fission
  • Bacteria reproduce by a process called binary fission
  • Binary fission: a copy of their single chromosome is produced and then the cell divides in half so that one half gets one chromosome and the other half gets the other chromosome
  • Because the chromosome was duplicated, each new cell receives a complete set of hereditary information
asexual reproduction1
Asexual Reproduction
  • Binary fission is an example of asexual reproduction in single celled organisms
  • Multi-cellular organisms that reproduction asexually is more complex and occurs in the nucleus through mitosis.
  • Only types of asexual reproduction are:
    • Budding
    • Fragmentation
    • Gemmules (Internal Buds)
    • Regeneration
  • Offspring grows out of the body of the parent
  • Hydras exhibit this type of reproduction
  • Jellyfish also
  • reproduce through
  • budding
  • Sponges reproduce asexually through gemmules (internal buds)
  • A parent releases a specialized mass of cells that can develop into an offspring
  • In this form of asexual reproduction, the body of the parent breaks into distinct pieces, each of which can produce an offspring.
  • Molds, yeast and some mushrooms reproduce in this way.
  • If a piece of a parent is detached, it can grow and develop into a completely new individual.
  • Flatworms use this type of asexual reproduction.
  • In a complex cell going through asexual reproduction, the nucleus divides during a process called mitosis.
  • Mitosis ensures that each new cell received the same number and kinds of chromosomes that were present in the parent cell.
  • In both binary fission/mitosis, these processes produce two offspring with hereditary information that is identical to the parent cell.
advantages and disadvantages of asexual reproduction
Advantages and Disadvantages of Asexual Reproduction
  • Advantage: an organism does not have to wait for a partner to be able to produce offspring.
  • Disadvantage: the offspring are exactly like the parents (no variation in DNA).
  • Asexual reproduction does not allow organisms to have variation from generation to generation. (could cause an organism to die out if changes occur in ecosystem)