Cells Part 2 Flashcards
(14 cards)
What is the purpose of cell division? (3 reasons)
- growth.
- Replace and repair.
- Asexual reproduction.
Four phases of mitosis
Prophase
Metaphase
Anaphase
Telophase (cytokinesis)
What happens in interphase G1?
The cell grows,
DNA is checked for errors
DNA is present as long stringy tangled fibers called chromatin
What happens in interphase S
DNA chromosomes are replicated
Proteins and enzymes are synthesized
The centrosome which organizes microtubules is duplicated
What happens in interphase G2?
DNA is again checked for error
Duplicated chromosomes are still present as chromatin
Spindle fibers begin to branch out from the centrosomes
Which phase of mitosis is this? 1.The chromatin condenses into chromosomes.
Prophase
Which day of mitosis is this?
The nucleus and the nuclear membrane disappear
Prophase
Which stage of mitosis is this?
Spindle fibers begin to form from centrosomes, and centrosomes move to the poles of the cell
Prophase
Which stage of mitosis is this?
Duplicated chromosomes, move to the middle of the cell and lineup
Metaphase
Which stage of mitosis is this?
Centromeres separate and sister chromatids begin to move away from each other towards opposite poles
Anaphase
Which stage of mitosis is this?
At the end of this phase, there are complete set of chromosomes at each pole of the cell
Anaphase
Which stage of mitosis is this?
The nucleus and the nuclear membrane form around each set of chromosomes at the opposite poles
Telophase
Which stage of mitosis is this?
Chromosomes become less dense and uncoil into stringy chromatin
Telophase
What happens in cytokinesis?
Cytoplasm divides completely, there are now daughter cells genetically identical to the original parent cell
