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Cell Division
· Why do cells divide?
· Growth
· Reproduction
· Replace damaged cells…read more

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Mitosis ­ making new body cells
Put the stages of mitosis in the correct order
1. Chromosomes separate and move to opposite
ends of the cell
2. The cell grows and copies organelles
3. The cell has 2 copies of each chromosome
and lots of mitochondria
4. The cell divides to make 2 identical cells
Answer: 2 3 1 4…read more

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gametes
Meiosis ­ making sex cells
Arrange the stages in order:
1. The original cell splits into 2
2. The 2 cells split into 4 daughter cells
3. The chromosomes copy
4. The chromosomes separate
5. The chromosomes separate again
Answer: 3 4 1 5 2…read more

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Compare mitosis and meiosis in
human cells
Features Mitosis Meiosis
No. of 46 46
chromosomes in
mother cell
No. of daughter 2 4
cells
No. of 46 23
chromosomes in
daughter cells
Used in Asexual Making
reproduction, growth
and repair of cells gametes…read more

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Fertilisation
Egg + sperm zygote
23 + 23 46 chromosomes…read more

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