Fig. 20: Early and Late Prophase in a Plant Cell

During prophase, the chromatin condenses and the chromosomes become visible. Also the nucleolus disappears, the nuclear membrane fragments, and the spindle appartus forms and attaches to the centromeres of the chromosomes. These are dividing cells in the roor tip of an onion plant. Early and late prophase can be seen. In late prophase, the chromatin has condensed into chromosomes, the nucleolus is gone, and the nuclear envelope has been removed.

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