GCSE Biology - Mitosis | Chromosomes | Cell Division | Cytokinesis

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*** WHAT'S COVERED ***
1. The requirement for cell division in multicellular eukaryotic organisms.
* For growth, development, and repair.
2. An overview of the cell cycle (the life cycle of a cell).
* Stage 1: Growth (increase in size and sub-cellular structures).
* Stage 2: DNA replication and mitosis.
* Stage 3: Division (cytokinesis).
3. The structure and role of DNA and chromosomes.
* How DNA exists as long strings when not dividing.
* How DNA condenses into chromosomes (coiled packets) for division.
* The concept of genes controlling characteristics.
* Chromosome pairs in eukaryotic cells (e.g., 23 pairs/46 total in humans).
4. The process of mitosis.
* Duplication of each chromosome.
* Chromosomes lining up at the cell equator.
* Cell fibres pulling chromosome copies apart to opposite poles.
* Cytokinesis: division of the cell membrane and cytoplasm.
5. The outcome and purpose of mitosis.
* Formation of two genetically identical daughter cells.
* Enabling growth, development, repair, and continuation of the cell cycle.

*** CHAPTERS ***
0:00 Introduction: Why Cells Divide
0:38 The Cell Cycle
1:23 DNA, Genes & Chromosomes
2:13 Mitosis Stage 1: Chromosome Duplication
2:24 Mitosis Stage 2: Chromosome Alignment & Separation
2:45 Mitosis Stage 3: Cytokinesis (Division)
3:03 Purpose & Outcome of Mitosis

*** PLAYLISTS ***






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