PHYSICAClass 11 Botany simulations · Cell Cycle and Cell Division
The cell cycle clock
Move round a 24-hour human cell cycle: G₁, S, G₂ and M phase. Watch the DNA content double during S phase.
What to notice
DNA content doubles from 2C to 4C in S phase, but the chromosome number stays the same until mitosis.
Key relation
Interphase (G₁ + S + G₂) ≈ 95% of the cycle ; M phase ≈ 1 h of 24 h
Try this
Drag the clock to the end of S phase. What is the DNA content now?
What you can change
- Time in cycle: 0 to 24 h
- G₁ duration: 6 to 12 h
- S duration: 5 to 10 h
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