1. Unit 5: Cell Growth and Development 5.2 The Cell Cycle

2. Series of events where cell grows, prepares to divide, and divides to form two daughter cells.
The length of the cell cycle and each part varies depending on the type of cell
The cell spends 90% of its time in Interphase
Cell Cycle

3. Cell Cycle

4. Interphase Gap 1 (G1): Cell growth
Synthesis (S): DNA/chromosome replication
Chromatid: Each DNA strand in duplicated chromosome (sister chromatid)
Centromeres: the part of a chromosome that links sister chromatids
Mutations: a change in a gene due to damage or being copied incorrectly
Gap 2 (G2): Preparation for mitosis
Organelles and molecules needed for division produced
Contain twice as much DNA as the original cell
Interphase

5. Cell Division Mitosis: Nucleus divides into 2 nuclei
Cytokinesis: cytoplasm divides
Forms two identical daughter cells
Cell Division

6. Hand-Up Stand-Up Pair Up
What is the longest stage of the cell cycle called?
During what stages does the G1, S, and G2 phases happen?
During what phase does mitosis and cytokinesis occur?
During what phase is DNA replicated?
During what phase of the cell cycle does the cell grow?
Hand-Up Stand-Up Pair Up

7. Hand-Up Stand-Up Pair Up
How many stages are there in mitosis?
Put the following actions in order: DNA replication, cell grows, cell division, cell prepares for mitosis.
Explain why cells don’t just continue to grow larger as organism grow larger. Why do cells divide?
Hand-Up Stand-Up Pair Up

8. Word Bank:
Anaphase
Cell division (M phase)
Cytokinesis
G1- cell grows
G2- prepares for mitosis
Interphase
Metaphase
Mitosis
Prophase
S- DNA replication
Telophase