Name CH BIL 150 Workshop 4 Mitosis, Meiosis and Mendel The cell cycle of an aver
ID: 206235 • Letter: N
Question
Name CH BIL 150 Workshop 4 Mitosis, Meiosis and Mendel The cell cycle of an average mammalian cell is illustrated below. G1 start t0 hours G1/S : t2= 9.5 hours SG2 : t3= 18.5 hours G2/M: t4- 23.5 hours M/G 15-24 hours Gi (DNA synthesis) 1. How long did it take for the above-illustrated mammalian cell to complete one cell cycle? 2. How long did the mitosis/cytokinesis phase (M phase) last? what % of the total cell-cycle time does that constitute:? 3. what phase takes the longest time to complete during cell cycle and what % of the total cell cycle time does that constitute to? Explain why you think this might be the longest phase of the cell cycle 4. How long was the S phase? What is happening in the cell during the S phase?Explanation / Answer
1. It took 24 hours to complete one complete cell cycle.
2. It took 30 minutes to complete M phase.
3. G-phase takes longest time = 9.5 hrs. Percentage = (9.5/24) X 100 = 39.5%
4. Duration of S-phase = 9 hrs. DNA replication occurs during S-phase.
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