Describe5 marksChallenge
A slide of an animal cell undergoing mitosis is stained and observed under a light microscope. The following features are recorded:
- chromosomes have reached opposite poles of the cell and appear to be unwinding into thinner threads;
- a new nuclear envelope is visible around each chromosome cluster;
- spindle fibers are no longer visible;
- the cell surface membrane shows a shallow groove around the equator.
Describe the stage of mitosis that this cell is in, and outline the events that occur during this stage.