Page 156 - Science Course 3 (Book 1)
P. 156
Mo4-L4a: What is the Cell Cycle?
There are two main phases in the cell cycle — interphase and the mitotic phase.
Key Concept Interphase
What Is the Cell Cycle? Interphase occurs in three stages: G1, S, and G2
What are the two main phases of the cell cycle?
The cell’s DNA is copied during the S stage and is
arranged as pairs of identical chromosomes called
sister chromatids.
Sister chromatids are held together by a structure
called the centromere
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