The Cell Cycle

HideShow resource information
  • Created by: Chloe
  • Created on: 01-06-15 08:38
View mindmap
  • The Cell Cycle
    • Replication of DNA
      • Semi Conservative Replication
        • 1. Portion of DNA is looked at
          • 2. Enzyme DNA helicase causes the two strands to seperate
            • 3. DNA completes the splitting of the strand. Meanwhile free nucleotides that come from the nucleus are attracted to the complementary bases
              • 4. The bottom three nucleotides that are waiting, lined up are joined to the strands by DNA polymerase
                • 5. Once they are all joined up - forming a polynucleotide. Two identical strands of DNA are formed - one side is original and the other is daughter
    • Mitosis
      • 1. Prophase
        • in which the chromosomes become visible and the nuclear envelope disappears
      • 2. Metaphase
        • in which the chromosomes arrange themselves at the equator of the cell
          • in which the chromosomes become visible and the nuclear envelope disappears
      • 3. Anaphase
        • in which each of the two threads of a chromosome migrates to an opposite pole
          • in which the chromosomes arrange themselves at the equator of the cell
        • 4.Telophase
          • in which the nuclear envelope reforms
            • in which each of the two threads of a chromosome migrates to an opposite pole
        • Meiosis
          • 1st Division
            • homologous chromosomes pair up and and their chromatids wrap around each other. By the end of this stage the pairs have separated
              • Crossing over - chromatids cross over and the tension causes them to snap and then bind again - changes the alleles
              • one chromosome from each pair going into one of the two daughter cells
          • 2nd Division
            • The chromatids move apart at the end of meiosis 2, four cells have now been created

      Comments

      No comments have yet been made

      Similar Biology resources:

      See all Biology resources »See all Cellular processes and structure resources »