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structures that hold most of organism's DNA, which is duplicated and inherited. They are allocated to opposite sides of the parent cell.
1. chromosomes duplicated
2. chromosome duplication progresses + membrane grows
3. cell reaches twice its initial size, two daughter cells divide
- combination of protein and protein molecules
- as a cell prepares to divide, chromatin forms compact disks called chromosomes
- consist of 2 copies of chrosomes; identicle DNA molecules
- joined tightly together at the center w/ centromeres
Mitotic phase (M phase)
- about 10% of cell cycle
- Prophase, metaphase, anaphase, telophase, cytokinesis
- chromatin turns into chromomes
- disintegration of nuclear envelope + nucleolus
- centrosomes grow and begin to move towards centers
- spindles fully formed on both poles
- sister chromosomes separated
- sister chromosomes separated at centromeres and start to be attracted towards poles
- don't respond to cell cycle control system; continue to grow and divide rapidly
- can be dangerous or harmless
- can form tumors
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