Mitosis/Cell Division Flashcards
Mitosis only takes place if ______?
A cell successfully completes all the stages of interphase.
What is mitosis?
Mitosis describes the series of events that allow 1 cell to divide into 2 cells.
Why is successfully completing every step in interphase important before we divide a cell?
To prevent cellular disease
Describe Prophase.
- DNA condenses into ‘X’
- Nucleus breaks down exposing chromosomes
- Centrioles move to opposite sides of cell
What are the two major stages of a cell’s life and what do they do?
- Interphase - prepares to divide
2. Mitosis- divides
Interphase is broken up into 3 stages,what are these 3 stages? Describe them.
- G1 (Growth Phase 1) Phase - Rapid Growth,some organelles begin to replicate
- S Phase (Synthesis Phase) - DNA inside cell goes through stages of replication,DNA doubles
- G2 Phase - cell continues to grow, centrioles used to pull chromosomes cell apart during division
A cell’s nucleus contains the cell’s ____?
DNA
What is a centriole?
The middle of each chromosome in which there’s a large protein molecule
What is a chromatid?
The strand of DNA in which makes up a chromosome
Describe Anaphase
- Centrioles pull the chromosomes from both sides
- Centromes split down the MIDDLE
Describe Telephase.
- New nuclei form around separated chromosomes at each end at the cell.
Describe Cytokinesis.
- Cell pinches itself off in the middle.
What are the stages of mitosis (in order)?
- Prophase ( Early & Late)
- Metaphase ( Middle)
- Anaphase
- Telophase
- Cytokinesis
*(remember; PMATC)
In mitosis,when one cell goes through mitosis the end result is _______
Genetically identical cell’s. The original cell is the parent cell. The two NEW cell’s that are produced are daughter cell’s.
How is a cell described that is preparing for cell division?
Interphase
