B2 5.2: Cell division in sexual reproduction.

All information was taken directly from the AQA revision guide with only the key points from B2 5.2.

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  • Created by: JSpencer
  • Created on: 28-02-16 21:22
What are the cells in reproductive organs?
Testes and ovaries
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What does meiosis produce?
Sex cells or Gametes
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What are the gametes in humans?
Sperm and ova.
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What does each gamete have?
One chromosome from each original pair and all cells are different from each other and their parent cell.
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What does sexual reproduction result in?
Greater variation as gametes from each parent fuse. This means thathalf the genetic info comes from the mother the other half from the father.
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What happens when gametes join at fertilisation?
A single body cell with new pairs of chromosomes is formed.
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How does a new individual then develop?
By these cells repeatably dividing by mitosis.
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What happens before division?
A copy of each chromosome is made.
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How many times does the cell divide?
Twice to form 4 gametes.
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What does each gamete have?
A single set of chromosomes each with a different combination of genes.
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Other cards in this set

Card 2

Front

What does meiosis produce?

Back

Sex cells or Gametes

Card 3

Front

What are the gametes in humans?

Back

Preview of the front of card 3

Card 4

Front

What does each gamete have?

Back

Preview of the front of card 4

Card 5

Front

What does sexual reproduction result in?

Back

Preview of the front of card 5
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