1. Cell Theory All living things are made of cells
Cells are the basic functional unit of living things
All cells come from preexisting cells

2. The Cell Cycle Cell Replication

3. The Cell Cycle Interphase – Growth Mitosis – Cell Division G1 Phase
S Phase
G2 Phase
Mitosis –
Cell Division
Prophase
Metaphase
Anaphase
Telophase

4. INTERPHASE G1 Phase (Gap 1 Phase) S Phase (Synthesis G2 (Gap 2 Phase)
Cell grows and functions normally
Produces more organelles
Cytoplasm increases
S Phase (Synthesis
DNA Replication occurs
G2 (Gap 2 Phase)
Growth continues in preparation for mitosis

5. M PHASE (Mitosis) Division of the cell Reminder
Chromosome: 2 sister chromatids held together (forms an “X)
Chromatid: half a chromosome (single side of an “X”
Centromere: holds sister chromatids together to form a chromosome

6. Prophase Nuclear envelope disappears
DNA molecules coil to form chromosomes
Centrioles migrate to opposite poles
Spindle fibers appear

7. Metaphase Chromosomes align along equator
Spindle fibers attach to centromere

8. Anaphase Centromere splits and pulls chromosomes apart into chromotids
Chromotids move to opposite poles

9. Telophase Chromotids begin to unwind into loose strands of DNA
Nuclear envelope reappears
Spindle fibers disappear
Cytokinesis: division of plasma and cell membrane

10. INTERPHASE
Mitosis
PROPHASE
TELOPHASE
METAPHASE
ANAPHASE

11. Identify each of the stages of mitosis!

12. What about the FIRST cells of an organism?
Fertilization and Meiosis