Mitosis study Flashcards
How many phases makes up mitosis?
4 phases
Prophase
Metaphase
Anaphase
Telophase
What is the first and longest phase in mitosis?
Prophase
Prophase
- Chromatin condenses into chromosomes
- Nuclear envelope breaks down
- Centrioles move to opposite poles of the cell
- Spindle starts to form
what are the spindle made of?
The spindles consist of microtubules that pull chromosomes apart during cell division
Metaphase
- Spindle fibers attach to the centromere of each pair of sister chromosomes
- Sister chromatids line in the equator of the cell also know as the metaphase plate
- The spindle fibers ensure that the sister chromatids will separate and go to different daughter cells
Anaphase
- Sister chromatids are pulled apart by the shortening of the spindle fibers and form singular chromosomes
- The singular chromosomes go to opposite poles and at the end each pole has a set of chromosomes
Telophase
- Chromosomes uncoil and form chromatin
- The spindle breaks down
- New nuclear membrane is formed
Cytokinesis
- final stage of cell division in both prokaryote and eukaryotic cells
- the cytoplasm splits into 2 and the cell divides
Cytokinesis in animal cells
cell membrane of the parent cell pinches inward along the cells equator until 2 daughter cells are formed
- a cleavage furor and a contractile ring is used in cytokinesis of animals cells
Cytokinesis in plant cells
A cell plate is formed along the equator of the parent cell and a new cell membrane and cell wall forms along each side of the cell plate
- this allows the plant cell to divide into 2 daughter cells