2. Main Concepts Cell Cycle
1. The cell cycle is:
the life of a cell, from
when it starts as a single
cell until it divides into two.
2. Three main parts of
the cell cycle
A. Interphase
B. Mitosis
C. Cytokinesis
3. Parts of mitosis
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

3. Prophase Prophase – DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers
Prophase

4. Metaphase Prophase Metaphase – Chromosomes align in Middle
Chromosomes attach to spindle fibers.
Metaphase
Prophase
Prophase –
DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers

5. Anaphase Metaphase Prophase Anaphase – Chromosomes are pulled Apart
Centrioles pull chromatids to either
side of the cells
Anaphase
Metaphase
Prophase
Metaphase –
Chromosomes align in Middle
Chromosomes attach to spindle fibers.
Prophase –
DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers

6. Telophase Anaphase Metaphase Prophase
Telophase – (telo means end in Latin)
Cell begins to pinch into Two
Nuclear envelope begins to reform
around chromatids
Telophase
Anaphase –
Chromosomes are pulled Apart
Centrioles pull chromatids to either
side of the cells
Anaphase
Metaphase
Metaphase –
Chromosomes align in Middle
Chromosomes attach to spindle fibers.
Prophase
Prophase –
DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers

7. Telophase Anaphase Mitosis Metaphase Prophase Cytokinesis
Cytokinesis – (means cells move)
Cytoplasm breaks into two;
Cells continue with cell cycle
Cytokinesis
Telophase – (telo means “end” in Latin)
Cell begins to pinch into Two
Nuclear envelope begins to reform
around chromatids
Telophase
Anaphase –
Chromosomes are pulled Apart
Centrioles pull chromatids to either
side of the cells
Anaphase
Mitosis
Metaphase
Metaphase –
Chromosomes align in Middle
Chromosomes attach to spindle fibers.
Prophase
Prophase –
DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers

8. Interphase Telophase Anaphase Mitosis Metaphase Prophase Cytokinesis
Cytoplasm breaks into two;
Cells continue with cell cycle
Telophase – (telo means “end” in Latin)
Cell begins to pinch into Two
Nuclear envelope begins to reform
around chromatids
Cytokinesis
Telophase
Interphase
Anaphase –
Chromosomes are pulled Apart
Centrioles pull chromatids to either
side of the cells
Anaphase
Mitosis
Metaphase
Metaphase –
Chromosomes align in Middle
Chromosomes attach to spindle fibers.
Prophase
Prophase –
DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers

9. Interphase G1 Telophase Anaphase Mitosis S-phase Metaphase Prophase G2
G One
Cytokinesis –
Cytoplasm breaks into two;
Cells continue with cell cycle G1
(growth or gap)
Telophase – (telo means “end” in Latin)
Cell begins to pinch into Two
Nuclear envelope begins to reform
around chromatids
Cytokinesis
Telophase
Interphase
Anaphase –
Chromosomes are pulled Apart
Centrioles pull chromatids to either
side of the cells
Anaphase
Mitosis
S-phase
(synthesis)
Metaphase
Metaphase –
Chromosomes align in Middle
Chromosomes attach to spindle fibers.
Prophase G2
(growth or gap)
Prophase –
DNA condenses into chromosomes
Nuclear envelope lyses
Centrioles build spindle fibers

10. In preparation for mitosis in microscopes!
Interphase
Prophase I
Metaphase
Anaphase T
Telophase
Cytokinesis A C P M

11. What it’s going to seem…

12. Let’s just try… Click for better on-line image!
What looks different between the many cells?

13. Real onion cell drawing
Mitosis in the onion!
Phase
Drawing
Real onion cell drawing
What’s happening?
(Full sentences!)
Interphase
During interphase, the cell is doing things like growing, synthesizing enzymes or other proteins, breaking down food or lysing intruder cells, like an invader bacteria! It could also be making another copy of its DNA. G1, S and G2