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Published byErick Brace Modified over 2 years ago

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e.g., After a first division (takes ~90 min) in Xenopus egg, the next 11 divisions occur synchronously (~30 min intervals), producing ~4096 (212) cells within 7 hr Each cycle is divided into S and M phases, without detectable G1 and G2 phases

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The Cell Cycle cell cycle control system, which is similar to a clock Figure 12.14 Control system G 2 checkpoint M checkpoint G 1 checkpoint G1G1 S G2G2 M

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Memiliki check point yang spesifik cell cycle akan berhenti sampai ada sinyal untuk lanjut G 1 checkpoint G1G1 G1G1 G0G0 (a) If a cell receives a go-ahead signal at the G 1 checkpoint, the cell continues on in the cell cycle. (b) If a cell does not receive a go-ahead signal at the G 1 checkpoint, the cell exits the cell cycle and goes into G 0, a nondividing state. Figure 12.15 A, B

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SIKLUS SEL Made Pharmawati

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Cyclin levels and MPF activity

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How G1-cyclin controls entry into S-phase

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Cell Cycle and Mitosis AP Biology Unit 3 Cell Cycle Cell Cycle = the entire cycle of a cell from one division to the next –Interphase (G1, S, G2) = between.

Cell Cycle and Mitosis AP Biology Unit 3 Cell Cycle Cell Cycle = the entire cycle of a cell from one division to the next –Interphase (G1, S, G2) = between.

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