Transcript Cell Reproduction

Cell Reproduction
Cell Growth
Increase in:
Limited amount
Size =
Number = Most growth
Mitosis
=
the process in which a
Eukaryotic cell divides itself
into two equal, genetically
identical parts
Mitosis
Five Phases
1.
2.
3.
4.
5.
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
1. Stage of cell growth
2. All organelles reproduce.
3. Chromosomes duplicate themselves.
4. The cell spends most (90%)of its time
in this phase.
5. The cell cycle is at rest in this phase.
http://fermat.stmarys-ca.edu/~jpolos/science/telophase.html
Copyright John Polos January 21, 1999
Interphase
Prophase
1. Chromosomes start to become visible
2. Nucleolus disappears
3. Centrioles move apart
4. Centrolies start to produce the spindle
5. Nuclear Envelope disappears
Prophase
Metaphase
1. Centrioles are lined up at opposite
ends (poles) of the cell.
2. Chromosomes are lined up across the
middle of the cell in identical pairs.
3. The Spindle has connected the daughter
chromosomes to the poles.
Metaphase
Anaphase
1. "Daughter" chromosomes begin moving
to opposite poles.
2. Spindle fibers get shorter.
3. By the end, each pole has equal number
of identical chromosomes .
Anaphase
Telophase
1. The spindle starts to dissolve
2. The nuclear envelope starts to reform.
3. The cell membrane starts to close
together in the center of what was
the old cell, forming 2 new cells.
(Cytokinesis)
http://fermat.stmarys-ca.edu/~jpolos/science/telophase.html
Copyright John Polos January 21, 1999
Telophase
Telophase (complete)
Interphase
http://www.bioweb.uncc.edu/biol1110/Stages.htm
Prophase
Metaphase
Anaphase
Telophase
http://www.bioweb.uncc.edu/biol1110/Stages.htm