7.2 Study Guide

Question 1

What happens in each stage of mitosis?

Answer 1

1. Prophase: Chromosomes condense and become visible, the nuclear envelope breaks down, centrosomes move to opposite sides of the cell, and spindle fibers form.
2. Prometaphase: The nuclear envelope completely breaks down, centrosomes continue to move to opposite sides, and spindle fibers attach to the centromere of each chromosome.
3. Metaphase: Chromosomes align at the metaphase plate, and spindle fibers ensure sister chromatids are attached to spindle fibers from opposite centrosomes.
4. Anaphase: Sister chromatids separate, and individual chromosomes move to opposite poles of the cell.
5. Telophase: Chromosomes decondense, nuclear envelopes reassemble, and spindle fibers disassemble. After telophase, cytokinesis occurs, resulting in two identical daughter cells with the same genetic material as the parent cell.

Question 2

How to identify what stage of mitosis a cell is in?

Answer 2

Look for key concepts in a sentence or picture of the stage.

Question 3

What are the results of mitosis and what do we use mitosis for?

Answer 3

Mitosis produces new cells, and replaces cells that are old, lost or damaged. In mitosis a cell divides to form two identical daughter cells.