Biology Cell division and cell organisation

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  • Created by: Chloesn
  • Created on: 10-04-14 23:17
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  • Chapter 3 Cell Division and Cellular Organisation
    • Cell cycle
      • Interphase
        • 95%
      • Mitosis
        • 1. Prophase
          • Chromosomes visible - 2 chromatids
          • Centrioles move - spindle starts to form
        • 2. Metaphase
          • Nuclear envelope disappears
          • Microtubules move centromeres to the center
        • 3. Anaphase
          • Centromeres split
          • Chromatids pulled to opposite poles
        • 4. Telophase
          • Chromatids now chromosomes
          • Nuclear envelope forms
        • 80mins
      • 5. Cytokinesis
        • Cytoplasm divides into two
      • 24 hours
      • Each cell = 48 chromosomes
    • Differentiation
      • Usually irreversible
      • Specialized cells
        • Neutrophils
        • Erythrocytes
        • Spermatozoan
        • Xylem vessel
        • Phloem sieve tube
    • Specialized cells
      • Neutrophils
      • Erythrocytes
      • Spermatozoan
      • Xylem vessel
      • Phloem sieve tube
    • Tissues
      • Collection
    • Organs
      • Structural and functional unit
    • Organ systems
      • Collection of organs
    • Communication
    • Meiosis
    • Stem cells
      • Totipotent
    • Meristem
    • Homologous
      • Genes for the same features
        • Differnet variaties - alleles
      • 'Same position'

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