A-Level Biology OCR A
Fibers Chromosomes Nuclear Spindle Draw Annotate Describe Occurs
| Front |
Draw, annotate and describe what occurs during prophase. |
| Back |
Prophase:- Chromatin fibers begin to coil & condense forming chromosomes (visible if stained)
- Nucleolus disappears, nuclear membrane starts breaking down
- Protein microtubules form spindle fibers
- If cell has centrioles, they migrate to opposite poles of cells
- Spindle fibers attach to specific areas on centromeres, start moving chromosomes to center
- By the end, nuclear envelope has disappeard
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A-Level Biology OCR A