Biology     CELL DIVISION Cell division is a process by which new cells are formed from pre-existing ones. Cells divide by two processes- mitosis and meiosis. Let us look at the difference between them. NOTE: Chromosomes occupy a central stage in cell division. MITOSIS MEIOSIS One cell division involves four phases Broadly two phases are involved, meiosis I and meiosis II. Prophase I has five substages Occurs in all somatic cells Occurs in reproductive cells only Chromosome number remains the same (2n) Chromosome number reduces (n) Two daughter cells are produced Four daughter cells are produced Genetic material remains constant Genetic variability occurs Crossing over does not take place Crossing over takes place