Cell Cycle - 4 Flashcards
steps in the cell cycle:
- Interphase
- G1
- S
- G2 - Mitotic Phase
- Mitosis
- Cytokinesis
G1
cell growth
- cell grows in size
- makes organelles
- carries out normal activities
S
synthesis
DNA replication
- DNA copied so that during mitosis each new cell will get a copy of chromosomes
- by the end of S phase, cel will have twice as much DNA
G2
preparation for Mitosis
- cell makes structures it needs to divide (centrioles and spindle fibers) and preps for cell division
- spindle fibers attatch to the centromere of each chromosome which helps to ensure proper cell divison
Mitosis steps
- Prophase
- Metaphase
- Anaphase
- Telophase
Prophase
condenses chromosomes
nucleus still there
Metaphase
chromosomes line up in the middle of cell
nucleus gone
spindle fibers connecty to centromere
Anaphase
chromosomes move away to opposite sides of cells using spindles which help them move along
sister chromatids separate
Telophase
chromosomes on complete opposite sides
nucleus forming surrounding them
nuclear envelope reforms
cleavage furrow forming
tangle of chromatin
spindles disapear
Cytokinesis
cytoplasm divides and dividing cell will split into TWO NEW IDENTICAL cells and be ready to start G1 again in a new cell
what type of cells undergo mitosis?
somatic
what happens to DNA durong mitosis?
it gets condensed
uncondensed form of DNA
chromatin
centromere
attatch sister chromatids at the center
Prokaryotic Cell Cycle
- binary fission
- rapidly under ideal conditions
- asexual reproduction making 2 genetically identical cells with teh same DNA
