1. Cell Division 10.2

2. Mitosis
• Part of eukaryotic cell division during
which the cell nucleus divides.

3. Cytokinesis
• Division of the cytoplasm during cell
division.

4. Chromatid
• One of two identical “sister” parts of a
duplicated chromosome.

5. Centromere
• Area where the chromatids of a
chromosome are attached.

6. Interphase
• Period of the cell cycle between cell
divisions.

7. Cell Cycle
• Series of events that cells go through as
they grow and divide.

8. Prophase
• First and longest phase of mitosis, during
which the chromosomes become visible
and the centrioles separate and take up
positions on the opposite sides of the
nucleus.

9. Centriole
• One of two tiny structures located in the
cytoplasm of animal cells near the
nuclear envelope.

10. Spindle
• Fanlike microtubule structure that helps
separate the chromosomes during
mitosis.

11. Metaphase
• Second phase of mitosis, during which
the chromosomes line up across the
center of the cell.

12. Anaphase
• The third phase of mitosis, during which
the chromosome pairs separate and
move toward opposite poles.

13. Telophase
• Fourth and final phase of mitosis, during
which the chromosomes begin to
disperse into a tangle of dense material.

14. Key Concept
• What are the main events of the cell
cycle?
–During the cell cycle, a cell grows,
prepares for division, and divides to
form two daughter cells, each of which
then begins the cycle again.

15. Key Concept
• What are the four phases of mitosis?
–Biologists divide the events of mitosis
into four phases: prophase,
metaphase, anaphase, and telophase.