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Cell reproduction (part 1)
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Cell reproduction (part 1)






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Cell reproduction (part 1) Cell reproduction (part 1) Presentation Transcript

  • Mr. Nettles Biology I: Cell Growth and Reproduction (Part 1)
  • Today’s Objectives
    • I will define: growth , reproduction , asexual reproduction , and sexual reproduction .
    • I will explore an example of asexual reproduction.
    • I will explore an example of sexual reproduction
  • Agenda – Wed., Sept. 21, 2011
    • Warm-Up
    • Lesson
    • Wrap-Up
    • Research (The Cell Cycle)
  • Warm-Up (Review)
    • Which group of biomolecules is responsible for making and storing energy ?
    • A normal cell swells when placed in a mystery solution . Is that mystery solution hypotonic or hypertonic?
    • I am an organelle only present in animal cell. I transfer chromosomes during cellular reproduction. What am I?
    • Reproduction – making new cells or organisms from older cells or organisms
    • Growth – how an organism
    • increases in size
    • and complexity
    copyright cmassengale
  • How do Prokaryotes grow and reproduce?
  • Prokaryotes Review:
    • Lack a nucleus
    • Have a single chromosome
    • Reproduce by binary fission
    • Includes bacteria
    copyright cmassengale
  • Asexual Reproduction
    • Reproduction that involves only one parent cell or organism.
    • Binary Fission is an example of asexual reproduction.
    copyright cmassengale
  • Asexual Reproduction Short Film
  • Steps in Binary Fission
    • Used by bacteria (prokaryotes)
    • Cells increase in size a little
    • DNA & cell parts are copied
    • Each cell divides into 2 daughter cells
    copyright cmassengale
  • Binary Fission of Bacterial Cell copyright cmassengale
  • How do We (Eukaryotes) grow and reproduce?
  • Review Eukaryotes:
    • Contain a nucleus & membrane bound organelles
    • Reproduce cells by mitosis
    • Includes plants, animals, and people
    copyright cmassengale
  • Sexual Reproduction
    • Reproduction that involves two parent cells or organisms.
    • Mitosis is an example of sexual reproduction.
    copyright cmassengale
  • Sexual Reproduction Short Film
  • How many cells do we begin with?
  • 2
  • How do we get more?
  • Mitosis
    • Mitosis: 1 cell splits into 2 identical cells
    • Then 4, then 8, then 16…
  • Mitosis
    • Mitosis is like dividing in half.
    • Mitosis has 1 cell division.
  • Mitosis
    • The cells produced by mitosis are identical to the parent cells.
  • Mitosis
    • Body cells divide by mitosis for growth and repair.
  • Wrap-Up
    • What is the difference between asexual and sexual reproduction?
    • Binary Fission is an example of _________ reproduction.
    • Define Growth.
  • Research: The Cell Cycle
    • Choose one of the following stages of the cell cycle: G1 phase, S phase, G2 phase, M phase, or Cytokinesis.
    • Use the internet to research information about the stage that you have chosen.
    • Write four interesting things about what you read:
        • What is it? (The definition)
        • What happens?
        • How long does it happen?
        • What’s used? (What special cell parts or organelles are involved)