Mitosis

1. At which stages do these occur?

Chromatin condenses into chromosomes: prophase.

Chromosomes align in center of cell: metaphase.

Longest part of cell cycle: interphase.

Nuclear envelope breaks down: prometaphase.

Cell is cleaved into two new daughter cells: cytokinesis.

Daughter chromosomes arrive at the poles: telophase.

2. Watch the video and answer these questions:

How many chromosomes are visible at the beginning of mitosis? 0.

How many are in each daughter cell at the end of mitosis? 4.

The little green t-shaped things on the cell are: daughter chromosomes.

What happens to the centrioles during mitosis: they divide.

3. Identify the stages of these cells:

1. Metaphase.

2. Telophase.

3. Prophase.

4. Describe the cell in the following stages:

1. Prophase: Daughter chromosomes seem to be moving towards the ends.

2. Metaphase: Pulling the other chromosomes towards them.

3. Telophase: Cell begins to split into two.

5. Use the given website to record information about cells:

Total #: 36.

Interphase:

Number of cells- 20

Percent of cells- 55%

Prophase:

Number of cells- 10

Percent of cells- 27%

Metaphase:

Number of cells- 3

Percent of cells- 8%

Anaphase:

Number of cells- 2

Percent of cells- 5%

Telophase:

Number of cells- 1

Percent of cells- 2%

6. Record information on phases.

Whitefish:

View 1- Telophase

View 2- Metaphase

View 3- Prophase

View 4- Anaphase

Onion:

View 1- Anaphase

View 2- Metaphase

VIew 3- Interphase

View 4- Interphase

View 5- Telophase