Mitosis & The Cell Cycle
Mitosis is the process in which a eukaryotic cell separates the chromosomes in its cell nucleus into two identical sets in two daughter nuclei.
Why do cells divide by MITOSIS?
1. Growth &Repair
2. Reproduction of single celled organisms
3. constant environment
Cell Division - Binary Fission and Mitosis
Biotech Adventure - Mitosis - an interactive site
Mitosis - an animation
- Interphase : Chromosomes duplicate, and the copies remain attached to each other.
- Prophase : In the nucleus, chromosomes condense and become visible. In the cytoplasm, the spindle forms.
- Prometaphase : The nuclear membrane breaks apart, and the spindle starts to interact with the chromosomes.
- Metaphase : The copied chromosomes align in the middle of the spindle.
- Anaphase : Chromosomes separate into two genetically identical groups and move to opposite ends of the spindle.
- Telophase : Nuclear membranes form around each of the two sets of chromosomes, the chromosomes begin to spread out, and the spindle begins to break down.
- Cytokinesis : The cell splits into two daughter cells, each with the same number of chromosomes as the parent. In humans, such cells have two copies of 23 chromosomes and are called diploid.
The Genetic Code
DNA Anatomy - an interactive site
DNA Replication - an interactive site