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What is the cell life cycle?
stages involving cell division, preparation for cell division, and normal cell function
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What is Interphase?
grows, performs its normal cell function, and prepares for cell division
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Majority of the time, the cell is in what phase?
interphase
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What is G1 in Interphase?
growth 1 - after a cell is created, it enters this stage and performs its specialized function
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What is S?
synthesis (creating) - DNA is copied so there are 2 sets of chromosomes. Getting ready to start dividing
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What is G2?
growth 2 - cell continues to grow and prepare for cell division
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What are the 3 stages of Interphase?
- G1 (growth 1)
- S (synthesis)
- G2 (growth 2)
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What is the number one rule of the cell life cycle that the DNA has to do?
the DNA has to always be in the nucleus
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What are the 3 reasons that Cell Division is needed?
- 1. replace dead cells
- 2. heal damaged tissue
- 3. during growth or development
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What is Mitosis and how long does it take to complete?
the division of the cell's nucleus described in 4 sages that may take about 2 hours to complete
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What are the 4 phases if Mitosis?
Prophase, Metaphase, Anaphase, Telephase
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What is Prophase?
nuclear envelope breaks down, DNA condenses from chromatin to chromosomes, mitotic spindle forms
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What is metaphase?
mitotic spindle lines the chromosomes at the equatorial plate (straight line, right in the center)
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What is Anaphase?
chromosomes strands 9sister chromatids) are pulled apart to opposite poles of the cell
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What is Telophase?
the cell forms a cleavage furrow, nuclear envelopes begins to form and chromosomes return to chromatin. Telophase caves in and cuts off (splits in half)
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What is Cytokinesis?
the division of the entire cell into two cells where the cytoplasm divides and organelles are seperated between the 2 new cells. Cyto means cell and kinesis means movement.
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