6. Most cells do not go directly from DNA replication to mitosis - what needs to
ID: 198984 • Letter: 6
Question
6. Most cells do not go directly from DNA replication to mitosis - what needs to happen first and what is the name of this phase of the cell cycle? 7. What are the names and orders of the 5 subdivisions of mitosis? 8. What does the cell check to make sure has happened at the checkpoint after DNA replication, but before mitosis? 9. What does the cell check to make sure has happened at the checkpoint before entering DNA replication? 10. What does the cell check to make sure has happened at the checkpoint during metaphase? 11. Human gametes have what n value? What cells are these derived from? 12. What phase of the cell cycle do we say that cells are in if they will not divide again? 13. What is the process by which mitotic cells finally create two separate cells? What are the names of the structures or configurations that are observed during this process in plant and animal cells 14. What are the terms we use to describe the cell division of cells with regards to rn value as a consequence of Meiosis I and Meiosis Il?Explanation / Answer
6. After DNA is replicated in the S phase it undergoes proofreading of the newly synthesized DNA molecules. Now it enters the G2 phase during which the cell continues to grow and produce proteins needed for mitosis stages. The mitochondria also were grown and divide at this stage.
7. The name and order of five stages of mitosis are:
1) Interphase
G0, G1, S, G2
2) Prophase
3) Metaphase
4) Anaphase
5) Telophase
8. Before mitosis after replication of DNA at G2 phase, the cell has to pass through the G2 checkpoint which looks for DNA damage and incomplete replication before proceeding to mitosis.
9. Detection of DNA damage is checked at the G1 checkpoint before replicating the entire genome. If the damage is found a signaling cascade halt the cell in G1 phase until the repair is complete.
10. During metaphase, the cell is checked for sister chromatids getting aligned along the equator of the cell with help of kinetochore attaching to the microtubules.
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