G1 Phase (First Gap Phase)
* Growth and development: The cell increases in size and synthesizes new proteins and organelles.
* Preparation for DNA replication: The cell prepares for the upcoming DNA replication process.
* Checkpoint: This phase includes a checkpoint to ensure that the cell has sufficient nutrients, adequate size, and no DNA damage.
S Phase (Synthesis Phase)
* DNA replication: The cell replicates its DNA, resulting in two identical copies of the entire genome.
* Centriole duplication: The cell duplicates its centrioles, which are involved in cell division.
G2 Phase (Second Gap Phase)
* Further growth and preparation for mitosis: The cell continues to grow and synthesize proteins and organelles.
* Production of proteins needed for cell division: The cell produces the proteins needed for the upcoming mitosis.
* Checkpoint: Another checkpoint occurs to ensure DNA replication is complete and there are no errors.
Summary:
* G1 Phase: Cell growth and preparation for DNA replication.
* S Phase: DNA replication and centriole duplication.
* G2 Phase: Further growth and preparation for mitosis.
After G2, the cell enters M phase, which consists of mitosis (nuclear division) and cytokinesis (cell division).
Let me know if you have any other questions about the cell cycle.
