1. What do cells spend their time doing? Why do they do this?
N-6 Cell Division
What do cells spend their time doing? Why do they do this?

2. Cell Cycle: The regular sequence of growth and division that happens in cells

3. Stage 1: Interphase
During interphase, the cell grows to its mature size, makes a copy of its DNA, and prepares to divide into two cells
Growth – during the first part of interphase, the cell doubles in size
DNA Replication – the cell makes a copy of its DNA in the nucleus. This means that there are TWO copies of the DNA (instructions) in each nucleus
Cells spend 90% of their lives in this stage

4. Stage 2: Mitosis
During mitosis, one copy of the DNA is distributed into each of the two ‘daughter’ cells.
This is divided into four parts:
Prophase
Metaphase
Anaphase
Telophase

5. Chromosomes: (humans have 23 pairs)
DNA
Centromere
Two Chromatids

6. Mitosis - Prophase
Chromosomes are visible

7. Mitosis - Metaphase
Chromosomes line up in center of the cell

8. Mitosis - Anaphase
Chromatids are pulled to opposite ends of the cell

9. Mitosis - Telophase
New nuclear membranes form around each new set of chromosomes

10. Stage 3: Cytokinesis
The cell membrane ‘pinches’ together in the middle of the cell forming two ‘daughter’ cells.
Cytoplasm divides, distributing the organelles into each of the new cells.

11. Can we identify the following?
Prophase
Metaphase
Cytokinesis
Telophase
Anaphase
Ana or Telo?
Interphase 10

12. DNA Replication
DNA Replication ensures that each daughter cell will have all of the genetic information it needs to carry out its activities.
There are four pieces of the puzzle:
Adenine and Thymine
Cytosine and Guanine
The order that these ‘pieces’ fit together determine our genetics!
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