Transcript Mitosis
How do baby animals grow to be adults? Why do animals shed their skin? Cells divide for three purposes: • Organisms grow because cell division increases the total number of cells. • Each day, cells in your body wear out or become damaged and need to be replaced. • Asexual reproduction The Cell Cycle - Mitosis A cell grows, prepares for division, and then divides into two new cells. These two new cells, called daughter cells, are identical to the parent cell because they have the same DNA as the parent cell. 3 stages of the Cell Cycle: • Interphase • Mitosis –Prophase –Metaphase –Anaphase –Telophase • Cytokinesis Interphase • • • • Cell spends most of its life in this phase The cell grows to its full size DNA is copied in the nucleus of the cell Cell prepares to divide Interphase Prophase • 1st and longest phase of Mitosis • Chromosomes become visible • Centrioles separate and move to opposite ends of cell • Spindle fibers appear • Nuclear membrane disappears Prophase Metaphase • 2nd and shortest phase of Mitosis • Chromosomes attach to spindle fibers in center of cell Metaphase Anaphase • 3rd phase of Mitosis • Centromeres split apart and chromatids separate from each other. • Chromosomes move to opposite poles Anaphase Telophase • 4th and last phase of Mitosis • Chromosomes reach opposite poles of cell • Chromatids unwind back into chromatin • Nuclear membranes begins to form around the chromatin at each end • Spindle fibers disappear Telophase Cytokinesis • New cell membrane forms between two nuclei. • The cell splits into two new cells – each with identical chromosomes. Cytokinesis Mitosis Review Interphase Prophase Metaphase Anaphase Telophase Cytokinesis REMEMBER! Interphase Prophase Metaphase Anaphase Telophase Cytokinesis IPMATC Play Music At The Church Video Clips Click box to view movie.