Cell Division and Mitosis. TB 174-180. What you will learn:. EXPLAIN why mitosis is important. EXAMINE the steps of mitosis. COMPARE mitosis in plant and animal cells. LIST two examples of asexual reproduction. Why this is IMPORTANT.
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B. Interphase- period of cell growth and development
WHY is it important to copy hereditary material?
4 phases of nuclear division (mitosis), directed by the cell’s DNA (PMAT)
A. Steps of Mitosis
** Plant cells form spindle fibers , but not Centrioles
B. Results of Mitosis and Cell Division
Benign tumors are not cancerous – these cells do not spread to other parts of the body
DNA copies itself; chromatin
Nuclear envelope disappears, spindle fibers form
Chromosomes coil up
Chromosomes line up in the middle
Spindle fibers connect to chromosomes
Spindle fibers pull chromosome copies apart to opposite poles
Chromosome copies divide and move apart
Nuclear envelopes reform, 2 new nuclei are formed, spindle fibers disappear
Chromosomes uncoil back into chromatin
Division of the rest of the cell: cytoplasm and organelles
EX: Strawberry Plants
Figure 8A pg. 180