B2

What happens during the cell cycle?
The genetic material is doubled and then it divides into two identical nuclei by mitosis
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Why is mitotic cell division important?
For growth, repair and development of multi-cellular organisms
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What does a cell need to do before mitosis?
Grow and replicate the DNA to form two copies of each chromosome and increase sub-cellular structures
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What happens in mitosis?
One set of chromosomes is pulled to each end of the cell and the nucleus divides.
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What happens after mitosis?
The cytoplasm and the membranes divide to form two identical daughter cells
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Where does mitosis take place in plants?
In the meristems found in the shoot and root tips
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Why can you clone plants?
In the right conditions a plant cell will become unspecialised and undergo mitosis
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Why is it difficult to clone animals?
Most animal cells differentiate early in embryo development.
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What is a good source of stem cells for adults?
In the bone marrow
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Where can you find embryonic stem cells?
The inner cells found inside the zygote
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What is a zygote?
A cell which is formed by an egg and a sperm fusing
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Why are stem cells useful in plants?
We may be able to save rare plants and produce large populations of identical plants that are immune to diseases
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What could treatment with stem cells help with in humans?
Paralysis and diabetes
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What is the problem with embryonic stem cells?
They come from aborted embryos, people say it is a violation of human rights because it cannot give permission and others have religious beliefs about interfering with reproduction
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What is a risk with adult stem cells?
That they may be infected with viruses that could transfer infections or the stem cells will be rejected by the body
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Where else have embryonic stem cells been found?
In the umbilical blood and the amniotic fluid
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Why is therapeutic cloning better?
Because in this the embryo is produced with the same genes so the stem cells produces aren't rejected
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Other cards in this set

Card 2

Front

Why is mitotic cell division important?

Back

For growth, repair and development of multi-cellular organisms

Card 3

Front

What does a cell need to do before mitosis?

Back

Preview of the front of card 3

Card 4

Front

What happens in mitosis?

Back

Preview of the front of card 4

Card 5

Front

What happens after mitosis?

Back

Preview of the front of card 5
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