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| regular sequence of growth and division that cells undergo is known as the cell cycle. |
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- First stage of the cell cycle
- Period before cell division occurs
- The cell grows to its mature size, makes a copy of its DNA and prepares to divide into two cells.
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| Makes a copy of the DNA in its nucleus |
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- Second stage of the cell cycle
- Stage in which the cell's n ucleus divides into two new nuclei
- One copy of the DNA is distributed into each of the 2 daughter cells
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- Prophase
- Metaphase
- Anaphase
- Telophase
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| A doubles rod of condensed chromatin |
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| An identical rod or strand, of the chromosome |
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| Chromatin in the nucleus condenses to form chromosomes. Structure called spindle fibers form a bridge between the ends of the cell. The nuclear membrande breaks down. |
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| The chromosomes line up across the center of the cell. Each chromosome attaches to a spindle fiber at its centromere, which still holds the chromatids together |
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| The centromeres split. The two chromatids separate. One chromatid moves along the spindle fiber to one end of the cell. The other chromatid moves to the opposite end. The cell becomes stretched out as the opposite ends pull apart |
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| The chromosomes begin to stretch out and lose their rodlike appearance. This occurs in the two regions at the ends of the cell. A new nuclear membrane forms around each region of chromosomes |
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- Stage 3 - Final Stage
- The cell membrane pinches in the middle of the cell. Eventually, the cell pinches in two. Each daughter cell ends up with the same number of identical chromosomes and about half the organelles and cytoplasm
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| Ensures that each daughter cell will have all of the genetic information it needs to carry out its activities |
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