Cloning 0.0 / 5 ? BiologyDNA and inheritanceGCSEAQA Created by: SunsetCreated on: 27-12-13 10:26 Two methods of cloning only suitable for plants Cuttings and Tissue Cultures 1 of 12 How are plants cloned through cuttings? Short section of stem with leaves cut, dippedin rooting powder and planted in damp environnement 2 of 12 Why are cuttings dipped in rooting powder? To stimulate root growth 3 of 12 How can a damp environnement be created for cuttings? A clear plastic bag will trap humid air so redusing water loss by TRANSPIRATION 4 of 12 How are plants cloned by tissue culture? Cells taken from shoot tip, grown in nutrient jelly and divide by mitosis 5 of 12 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 6 of 12 What are the benefits of cuttings over tissue culture? FAster, cheaper and can use older plants 7 of 12 How does embryo splitting work (For animals) Sperm and egg fuse in dish, Embryo unspecialized cells split and implanted in host mother's uterus 8 of 12 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 9 of 12 What are social issues with cloning? Reduces variation making whole community more vulnerable to disease but could be used to cure disease 10 of 12 What are economic issues with cloning? Doctors could use it to make money and could be expensive for NHS 11 of 12 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 12 of 12
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