Cloning

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  • Created by: Sunset
  • Created on: 27-12-13 10:26
Two methods of cloning only suitable for plants
Cuttings and Tissue Cultures
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How are plants cloned through cuttings?
Short section of stem with leaves cut, dippedin rooting powder and planted in damp environnement
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Why are cuttings dipped in rooting powder?
To stimulate root growth
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How can a damp environnement be created for cuttings?
A clear plastic bag will trap humid air so redusing water loss by TRANSPIRATION
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How are plants cloned by tissue culture?
Cells taken from shoot tip, grown in nutrient jelly and divide by mitosis
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What are the benefits of tissue culture over cuttings?
100s of new plants are produced, shoot tip cells are usually free of disease causing pathogens
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What are the benefits of cuttings over tissue culture?
FAster, cheaper and can use older plants
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How does embryo splitting work (For animals)
Sperm and egg fuse in dish, Embryo unspecialized cells split and implanted in host mother's uterus
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How does adult cell cloning work?
Nucleus of unfertilized egg cell removed and adult bodycell nucleus inserted, electric shock causes egg to divide and implanted in uterus
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What are social issues with cloning?
Reduces variation making whole community more vulnerable to disease but could be used to cure disease
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What are economic issues with cloning?
Doctors could use it to make money and could be expensive for NHS
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What areethical issues with cloning?
Destroys an embryo - potential life, it is playing with nature and clones may not be healthy, e.g. Dolly the sheep
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Other cards in this set

Card 2

Front

How are plants cloned through cuttings?

Back

Short section of stem with leaves cut, dippedin rooting powder and planted in damp environnement

Card 3

Front

Why are cuttings dipped in rooting powder?

Back

Preview of the front of card 3

Card 4

Front

How can a damp environnement be created for cuttings?

Back

Preview of the front of card 4

Card 5

Front

How are plants cloned by tissue culture?

Back

Preview of the front of card 5
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