2. Life Cycle of the Cell
The life cycle of a cell is the period from cell reproduction to the next cell reproduction
3. MITOSIS
MITOSIS that cause division of the cell into two new daughter cells
INTERPHASE
the stage in the life cycle of a cell where the cell grows and DNA is
replicated
95 percent of the life cycle of even rapidly reproducing cells is
represented by the interval between mitosis, called interphase
4. Cell Mitosis
The actual process by which the cell splits into two new cells is called mitosis.
mitosis follows automatically within 1 or 2 hours.
5. Mitotic Apparatus: Function of the Centrioles.
One of the first events of mitosis takes place in the cytoplasm, occurring during the latter part of
interphase in or around the small structures called centrioles.
two pairs of centrioles lie close to each other near one pole of the nucleus.
Each centriole is a small cylindrical body about 0.4 micrometer long and about 0.15 micrometer in
diameter, consisting mainly of nine parallel tubular structures arranged in the form of a cylinder.
the entire set of microtubules plus the two pairs of centrioles is called the mitotic apparatus.
6.
7.
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11. Prometaphase.
nuclear envelope disappear
multiple microtubules from the aster
attach to the chromatids at the
centromeres,
where the paired chromatids are still
bound to each other; the tubules
then pull one chromatid of each pair
toward one cellular pole and its
partner toward the opposite pole.
