Answer
Mitosis is the process by which a cell divides into two identical daughter cells. In a tissue culture, mitosis occurs when a cell replicates its genetic material, divides into two daughter cells, and then each daughter cell grows and divides again. The process includes interphase, prophase, metaphase, anaphase, and telophase. During interphase, the cell grows and replicates its DNA. During prophase, the chromosomes condense and the nuclear envelope breaks down. During metaphase, the chromosomes line up in the middle of the cell. During anaphase, the chromosomes are pulled apart and move to opposite sides of the cell. During telophase, the chromosomes decondense and the nuclear envelope reforms. Finally, the cell divides into two daughter cells.