ADD BIO: Meiosis

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What is meiosis?
a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
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What does meiosis form?
Gametes.
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In humans, where does meiosis happen?
In the reproductive organs.
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Name the stages of Meiosis (first 2 stages).
1) Before the cell starts to divide it duplicates its DNA to produce an exact copy. 2) For the first meiotic division the chromosomes line up in their pairs across the centre of the cell.
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Name the stages of Meiosis (Stage 3 & 4).
3) The pairs are pulled apart. Each new cell has only one copy of each chromosome, some from the mother and some from the father. 4) Chromosomes line up across centre of nucleus ready for second division, and left and right arms are pulled apart.
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Name the stages of Meiosis (Stage 5).
5) There are now 4 gametes, each containing half the original number of chromosomes.
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What are the differences between mitosis and meiosis? (3 differences).
1) Mitosis produces two cells where meiosis produces four. 2) Mitosis produces identical cells where meiosis produces genetically different cells. 3) Mitosis has 1 divisions where meiosis has 2 divisions.
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Card 2

Front

What does meiosis form?

Back

Gametes.

Card 3

Front

In humans, where does meiosis happen?

Back

Preview of the front of card 3

Card 4

Front

Name the stages of Meiosis (first 2 stages).

Back

Preview of the front of card 4

Card 5

Front

Name the stages of Meiosis (Stage 3 & 4).

Back

Preview of the front of card 5
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