The Cell Cycle and Mitosis Cell Cycle Interphase
- Slides: 13
The Cell Cycle and Mitosis
Cell Cycle • Interphase • Mitosis • Cytokinesis
IMPORTANCE • 1. Growth • 2. Tissue Repair • 3. Keeps chromosome number constant.
Eukaryotic Cell Cycle • 1. Most of cell cycle consists of the interphase • 2. Mitosis describes nuclear division
INTERPHASE • 1. Cell prepares for mitosis • 2. Chromosomes duplicate. • (Chromosomes consist of two DNA strands).
Eukaryotic Cell Cycle • Most of cell cycle consists of the interphase. • Mitosis describes nuclear division.
STAGES OF MITOSIS • 1. Prophase • 3. Anaphase • 2. Metaphase • 4. Telophase
PROPHASE • 1. Chromosomes coil up and become visible • 2. Nuclear membrane disappears. • 3. Nucleolus disappears. • 4. Spindle appears. • 5. Centrioles move toward poles
What’s a spindle? • Made of the centriole and microtubules (part of the cytoskeleton) • The fibers attach to the centromere of the chromosome and “reel them in” • Interpretive Dance Time
METAPHASE Chromosomes become aligned at the equator of the spindle.
ANAPHASE • 1. Chromatids separate. • 2. Two identical groups formed. • 3. Separated chromatids move to opposite poles of the cell.
TELOPHASE • 1. Chromosomes uncoil and disappear • 2. Nuclear membrane reappears. • 3. In plant cells the cell plate appears. • Spindle fibers dissolve
Daughter Cell • The cytoplasm becomes divided a process called Cytokinesis and wall formation produces two daughter cells.
