1.2.2 - Mitosis & the Cell Cycle

What are the three main stages of the cell cycle?

1. Replication of DNA and synthesis of organelles

2. Mitosis

3. Division of cell

Why is mitosis important?

• Produces identical cells which all have the same genetic information

• Produces additional cells for growth and repair

Describe the first stage of the cell cycle

Longest stage - cells grow and increase in mass, replicate DNA and synthesize more organelles (e.g. mitochondria, ribosomes).

Describe the second stage of the cell cycle

Each chromosome in a pair is pulled to opposite poles of the cell, then the nucleus divides.

Describe the third stage of the cell cycle

The cytoplasm and cell membrane divide - two identical daughter cells are produced.