Download Cell Division - AKNS Students Blogspot

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When a cell is not dividing, the DNA is in the
form of a threadlike material called
chromatin.
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When a cell is about to divide, the chromatin
condenses to form
chromosomes. Chromosomes are structures
in the nucleus made
of DNA and protein.
• Describe the events of cell division in prokaryotes.
• Name the two parts of the cell that are equally
divided during cell division in eukaryotes.
• Summarize the events of interphase.
• Describe the stages of mitosis.
• Compare cytokinesis in animal cells with cytokinesis
in plant cells.
• Explain how cell division is controlled.
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Cell division is the process by which cells
reproduce themselves.
• Cell Cycle
– The cell cycle is the
repeating set of
events in the life of a
cell.
– The cell cycle
consists of cell
division and
interphase.
– Cell division in
eukaryotes includes
nuclear division,
called mitosis, and
the division of
cytoplasm, called
cytokinesis.
• Interphase consists of :
– G1 phase offspring cells grow to mature size.
– S phase cell’s DNA is copied.
– G2 phase cell prepares for cell division.
Cells can also exit the cycle and enter G0
phase. Example: cells in the nervous system.
• During cytokinesis in animal cells, a cleavage
furrow pinches in and eventually separates the
dividing cell into two cells.
• In plant cells, a cell plate separates the dividing cell
into two cells.
• Cell division in eukaryotes is controlled by
many proteins.
• Control occurs at three main checkpoints.