Mitosis Flashcards
1
Q
Where are centrioles most likely found?
A
- Human muscle cells
2
Q
- How many chromosomes do humans have?
A
- 46
3
Q
What happens during G1 of the cell cycle?
A
- Cells grow and prepare for DNA replication. Organelles duplicate
4
Q
What happens during S (synthesis) of the cell cycle?
A
- DNA replication occurs
5
Q
What happens during G2 of the cell cycle?
A
- Resting period before mitosis
- Checkpoint that DNA copying is correct
6
Q
What happens during Interphase?
A
- The resting phase
- Cells make copies of chromosomes
7
Q
What happens during Prophase?
A
- Chromosomes condense
- Spindle fibres start to form between centrioles
8
Q
What happens during Metaphase?
A
- Chromosome pairs line up on middle of spindle fibres
- Each pair consists of sister chromatids
9
Q
What happens during Anaphase?
A
- Spindle fibres contract, pulls centromere which splits it
- Each arm of the chromatid moves to opposite ends of the cell
10
Q
What happens during Telophase?
A
- One set of chromosomes at each end of the cell
- Spindle breaks down
- Nuclear membrane forms around each set of chromosomes
- Cell has 2 nuclei
- Chromosomes condense back to chromatin
11
Q
What happens during Cytokinesis?
A
- Cytoplasm splits into two separate cells
