Prophase Definition
prōfāz
noun
The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindle apparatus forms at opposite poles of the cell.
American Heritage Medicine
The first stage in mitosis, during which the chromatin is formed into chromosomes which split into separate paired chromatids.
Webster's New World
The first stage of meiosis.
Wiktionary
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