1. The Cell Cycle

2. Chromosomes Carry genetic information in eukaryotes
Made of DNA and proteins
Not visible in cell, unless the cell is dividing
2 identical chromatids (sister
chromatids) make up 1 chromosome
Centromere is the point where the
sister chromatids attach

3. The Cell Cycle
During the cell cycle the cell grows, prepares for division, and forms 2 daughter cells
The longest phase of the cell cycle is interphase

4. Interphase Consists of G1, S, and G2
G1: cell grows the most, makes proteins and organelles
S: DNA copies
G2: shortest, organelles associated with division produced

5. Mitosis Process of nuclear division
Made up of 4 phases: prophase, metaphase, anaphase and telophase
Centrioles are located in the cytoplasm and are necessary for division, they help organize the spindle
Spindle fibers are microtubules that move the chromosomes during mitosis

6. Prophase Chromatin condense Centrioles separate Spindle begins to form
Nuclear membrane breaks down

7. Metaphase Chromosomes line up on “equator”
Chromosomes connect to spindle

8. Anaphase
Sister chromatids separate into individual chromosomes

9. Telophase Chromosomes gather at poles
Chromosomes loose their distinct shape
Nuclear membrane forms

10. Cytokinesis Division of the cytoplasm
Cell “pinches” in half at the cleavage furrow
Results in 2 identical daughter cells with same chromosomes

11. Mitosis Video 1