Cell Cycle Flashcards
What is the longest portion of the cell cycle?
Interphase(G1, S, G2), 90% of the cell cycle.
What happens during G1 phase?
The cell grows and carries out normal functions. (prepare essential materials for S phase)
What happens during S phase?
DNA replication and chromosome duplication occurs
What happens during the G2 phase?
Final growth and preparation for mitosis
What are the main things that happen during the M phase?
Mitosis(nucleus divides) and Cytokinesis(Cytoplasm divides).
What 5 phases happen during mitosis?
Prophase, Prometaphase, Metaphase, Anaphase, Telophase.
What happens to chromatin during Prophase?
Chromatin condenses and form chrmosomes.
What happens to nucleoli during Prophase?
It disappears.
What happens to mitotic spindle during prophase?
It begins to form.
What happens to duplicated chromosomes during prophase?
It appears as sister chromatids.
What happens to the nuclear envelope during prometaphase?
It breaks down into fragments.
What do microtubules do during prometaphase?
They enter nuclear area and some attach to kinetochores.
What is the key event during metaphase?
Centrosomes are at opposite poles.
What do chromosomes do during metaphase?
Chromosomes line up at the metaphase plate.
Where are microtubules attached during metaphase?
Microtubules are attached to each kinetochore.
