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Cell Division

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Cell division occurs through mitosis and cytokinesis so that cells can grow in size and replicate damaged cells. Mitosis involves prophase, metaphase, anaphase and telophase where the genetic material (DNA) is copied and distributed equally between two daughter cells. Most of the cell cycle is spent in interphase where cells grow in size and replicate their DNA in preparation for cell division.

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Cell Division
Reason Cells are limited in size! So the only way to grow is to make more cells Repair damaged cells 55
The Process 58
1. Interphase Cell growth Copy of genetic material – DNA Preparation of division 56
2. Mitosis Cell separates DNA DNA Structure Chromosomes – Specific clumps of DNA Humans have 23 pairs Copied form of DNA (each called chromatid) Held together by centromere Ends called telomeres 57
2. Mitosis Prophase 59
2. Mitosis Metaphase 59
2. Mitosis Anaphase 58
2. Mitosis Telophase 58
3. Cytokinesis Cell separates 58
3. Cytokinesis 60
Cell Cycle 60 Human Liver Cell What are curved arrows? What stage of cell cycle is growth? How long does replication occur? What stage takes the most time?
Meiosis Reproductive cell division 92
Meiosis Process 94 Males – Females -
Line up of Genes 96

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Cell Division