Title: Cell Cycle
1Cell Cycle Mitosis
Chapter 6
2Cell Division
- Growth
- Development
- Reproduction
- Tissue repair
3Cell Cycle
Duplication of each chromatid
Cell contains twice as much DNA as compared to
the cell when in G1
4The Cell Cycle
- Interphase
- First growth (G1) phase Grows rapidly, carries
out normal functions - Synthesis (S) phase
- Second growth (G2) phase Growth and preparation
for mitosis - Mitosis Nucleus is divided chromosomes
divided - Cytokinesis Cytoplasm divides
- The end result is 2 genetically identical
daughter cells to parent cell
DNA is copied
5Mitosis
- Prophase Chromosomes coil, nuclear envelope
dissolves and spindle forms - Metaphase Chromosome line up along equator.
- Anaphase Centromeres divide and sister
chromatids move toward opposite poles. - TelophaseNuclear envelope forms, chromosomes
uncoil and cytokinesis begins.
6Chromosomes
http//www.johnkyrk.com/chromosomestructure.html
- Chromosomes DNA and proteins-histones (beads on
a string) - Sister chromatids Two exact copies of DNA
- Centromere Point where chromatids are attached
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9Mitosis in an Animal Cell
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11Cytokinesis
12Makes decision of whether cell will divide
Kinases-enzymes involved in triggering events in
the cycle
DNA replication checked by DNA repair enzymes
13Growth Regulation Cancer
B/c cancer cells do not have anchorage dependence
they can go to other parts of the body thru the
bloodstream
Cancer-uncontrollable growth of cells
As cancer cells build up, they form tumors
14Mitosis in a Plant Cell
http//www.johnkyrk.com/mitosis.html