Mitosis
- Created by: Nicola Carter
- Created on: 13-12-12 11:15
View mindmap
- Mitosis
- Interphase
- Cell prepares for mitosis
- DNA replicates
- New organelles are manufactured and cell grows
- Chromosomes are present as chromatin
- Prophase
- Chromosomes spiralise and condense, become visible threads
- Centrioles move to opposite poles of the cell and spindle fibres begin to form
- Chromosomes spiralise and condense further and can now be seen to consist of two sister chromatids joined at the centromere
- Metaphase
- Nuclear membrane has disintegrated and spindle fibres have grown across the cell
- Chromosomes line up independently along the equator of the spindle attaching to the fibres via their centromeres
- Anaphase
- The centromeres divide into two separating the sister chromatids of each chromosome
- Spindle activity pulls the chromatids apart and the separated chromatids move to opposite poles of the cell
- Telophase
- Chromosomes begin to uncoil
- The spindle fibres disintegrate and the cell begins to constrict along its central axis
- A nuclear membrane begins to form around each set of chromosomes
- Cytokinesis
- As the membrane continues to constrict, the cytoplasm becomes divided forming two genetically identical daughter cells
- Each cell now possesses an exact copy of each chromosome that was present in the nucleus of the original cell
- Interphase
Comments
No comments have yet been made