Cell cycle

• During this phase, the cell is metabolically active and continues to grow without replicating its DNA.

  Phase 1: G1 Phase (Cell Growth)
• DNA replication takes place during this phase


  Phase 2: S Phase (DNA Replication)
• The RNA, proteins, other macromolecules required for multiplication of cell organelles, spindle formation, and cell growth are produced as the cell prepares to go into the mitotic phase.


  Phase 3: G2 Phase (Preparing for Cell Division)
• is the process by which a single cell divides into two or more daughter cells Cell division can occur through two main mechanisms: mitosis and meiosis

  Cell division
• • Mitosis is the process by which a single cell divides into two identical daughter cells.
  • Happens in somatic cells (body cells)


  MITOSIS
• • Meiosis is the process by which a single cell divides into four daughter cells.
  • Happens in gametes (sex cells)

  MEIOSIS
• • Has 1 Division only
  • Creates Diploid cell (Two complete set of Chromosomes)
  • 46 Chromosomes

  Mitosis
• • Has 2 division (Meiosis I and Meiosis II)
  • Creates Haploid cell (Single set of chromosomes)
  • 23 Chromosomes

  Meiosis
• • Chromatin in the nucleus condenses into visible chromosomes
  • The centrosomes move to opposite poles of the cell.
  • The nuclear envelope breaks down, allowing the spindle fibers to attach to the chromosomes.

  Prophase
• • chromosomes line up along the equator of the cell, called the metaphase plate.
  • The spindle fibers ensure that the chromosomes are properly aligned and can be separated correctly

  Metaphase
• The sister chromatids of each replicated chromosome separate and are pulled towards opposite poles of the cell by the spindle fibers.

  Anaphase
• • The chromosomes reach the opposite poles of the cell, and the nuclear envelope begins to reform around each set of chromosomes.
  • The chromosomes begin to uncoil and return to their normal, diffuse form. The spindle fibers disassemble

  Telophase
• Cytokinesis is the process by which the cell divides into two daughter cells.

  Cytokineses