Example Question #4 : Cell Functions
1. Chromosomes begin to condense
2. Centrioles separate and begin to form a mitotic spindle as they move towards opposite sides of the cell
3. The nucleolus breaks down
During which phase of cell division do the given processes occur?
During prophase, the cell will begin to condense its chromosomes to prepare for separation during anaphase. The pair of centrioles in the cell will also separate and begin to move towards opposite ends of the cell, while remaining attached to each chromosome by a microtubule. These fibers form the mitotic spindle, which organizes and repositions the chromosomes during cell division. During this phase, the nuclear envelope and nucleolus also break down and disappear.