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Bacterial Reproduction

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Bacterial Reproduction Reproduction When conditions are favourable bacteria can reproduce every 20 minutes In 48 hours a single bacterial cell could become culture ... – PowerPoint PPT presentation

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Title: Bacterial Reproduction


1
Bacterial Reproduction
2
Reproduction
  • When conditions are favourable bacteria can
    reproduce every 20 minutes
  • In 48 hours a single bacterial cell could become
    culture 4000 times the mass of the earth
  • Thankfully the food supply is limited and this
    does not happen

3
Binary Fission
  • When a cell has almost doubled in size it will
    replicate its DNA and divide in half
  • This produces 2 identical daughter cells
  • Binary fission is a form of asexual reproduction
  • Asexual reproduction does not invovle the
    exchange of genetic material

4
Conjugation
  • Is a form of sexual reproduciton
  • Genetic Information is exchanged between
    individuals
  • A long bridge of proteins forms between two
    bacterial cells
  • DNA is transferred from one cell (donor) to
    another (recipient)

5
Spore Formation
  • Bacteria form spores during unfavourable
    conditions
  • One type is called an endospore
  • Cell forms a thick internal wall the encloses its
    DNA
  • Spores can remain dormant for months until
    conditions improve
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