Mitosis and Cell Division The Cell Cycle As
- Slides: 21
Mitosis and Cell Division
The Cell Cycle As eukaryotic cells grow and divide, they pass through a cell cycle that consists of 3 stages: • Interphase • Mitosis (cell division) • Cytokinesis (cell division)
The length of time to complete a cell cycle is different for different types of cells: • Embryonic cells divide rapidly • Adult nerve cells may never divide
Stage 1: Interphase • Interphase is the longest stage of the cell cycle • The cell performs its normal functions and, in preparation for cell division, duplicates its genetic material (DNA)
Stage 2: Cell Division - Mitosis Consists of 4 phases: Prophase Metaphase Anaphase Telophase
Mitosis Phase 1: Prophase • DNA compacts into visible form as chromosomes • Each chromosome contains two strands called sister chromatids. • Sister chromatids are held together by a centromere • The nuclear membrane breaks down
Mitosis Phase 2: Metaphase • Chromosomes line up in the middle of the cell.
Mitosis Phase 3: Anaphase • The centromere splits and sister chromatids separate. • They are now called daughter chromosomes. • They move to opposite ends of the cell, pulled by spindle fibres
Mitosis Phase 4: Telophase • Final phase of mitosis. • Chromosomes stretch out and are no longer visible. • A new nuclear membrane forms around each group of daughter chromosomes.
Stage 3: Cell Division - Cytokinesis • Final stage of cell division and cell cycle • The cytoplasm divides and two genetically identical cells are formed. • In a plant cell, a plate develops into a new cell wall • In an animal cell, the cell membrane is pinched off in the centre
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- Events of the cell cycle
- Cell cycle and cell division
- Phases of cell cycle
- Cell division mitosis and meiosis
- Two cells are produced
- Mitosis cell division
- Mitosis and cell cycle terminology
- Cell cycle concept map
- Non kinetochore microtubules
- Do centromeres split in mitosis
- Mitosis division
- Crossing over during prophase 1
- Mitosis division
- Recombinant chromosomes
- Ipmat mitosis
- Mitosis division
- Mitosis division
- Short division vs long division
- Terms for division
- Aynthetic division
- Synthetic division steps
- Biology.arizona.edu/cell bio/activities/cell cycle/01.html