Mitosis - cell division

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Today's lesson

1. Dagopening
2. What is mitosis?
3. Why is mitosis important?
4. What are the steps to mitosis? 
5. Mevrouw Velthoven - Bovenbouw biologie

What are the three reasons why cells remain small?

1. Large cells have difficulty diffusing nutrients rapidly enough
2. As cells grow, their ratio of surface area to volume decreases
3. Transportation of wastes become a problem for larger cells
4. All of the above

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In growth of tissues cells divide/ double. What needs to be done with the DNA if a cell divides?

Mitosis

One cell will split in two exact copies

One mother cell will become 2 daughter cells.

Prophase

• Chromosomes condense: each has two chromatids
• Nuclear membrane starts breaking down
• Spindle apparatus appears 

Metaphase

• Centromeres lined up on the equator
• Each chromatid attached to a spindle fibre 

Anaphase

• Separation of the sister chromatids 
• Sister chromatids move to opposite poles, now called chromosomes

Telophase

• Chromosomes have reached poles
• Nuclear membranes start forming
• Chromosomes uncoil, become less visible 

Cytokinesis

• Actual splitting of cytoplasm 

What was the lesson about?

1. What is mitosis?

2. Why is it important?

3. What are the different phases?

I still have questions about...