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nmasteringgenetics.com MasteringGenetic Eg mp3 saiptpdf MasteringGer masteringgenetics.com/myct/itemview?assignmentproblemID 4760098 of 3): Mitosis and the Cell Cycle (BioFlix tutorial) Gi checkpoint DNA replicates. Cell divides, forming two daughter cells. M checkpoint At this point, cell commits to go through the cycle. G2 checkpoint Mitotic spindle begins to Adapted from Biology by Campbell and Reece 2008 Pearson Education, Inc. ers Give Up Review Part me during the cell cycle t cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes cha each phase of the cell cycle by dragging the yes and no labels to the appropriate locations in the table. of the M phase, the parent cell has not yet divided to form two daughter cells.

Solution

(a) This phase is called Go phase.
     There are times when a cell will leave the cycle and quit dividing. This may be a temporary resting period or more permanent. An example of the latter is a cell that has reached an end stage of development and will no longer divide (e.g. neuron)

(b)This is the G1 checkpoint
It is the main decision point for a cell – that is, the primary point at which it must choose whether or not to divide. Once the cell goes through the G1 checkpoint and enters S phase, it becomes permanantly committed to division. That is experiencing unexpected problems,such as DNA damage or replication errors, a cell that passes the G1 checkpoint will surely complete rest of the way through the cell cycle and produce two daughter cells.