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Cloning - Science Fiction Or Science Fact Presentation Transcript

Slide 1 - Cloning – Science Fiction or Science Fact?
Slide 2 - What we will do today…… Extend knowledge on asexual reproduction and sexual reproduction Learn how can animals be cloned Look at problems with cloning
Slide 3 - What are clones? Genetically Identical copies
Slide 4 - Hydra budding to make a clone
Slide 5 - Asexual Reproduction Tiny 'buds' grow out from the hydra's side, develop mouth tentacles, and finally nip off at the base to form a separate individual.
Slide 6 - Amoeba dividing asexually
Slide 7 - Bacteria dividing asexually These are CLONES as only have information from 1 parent
Slide 8 - Spider plant making asexual clones Plants retain some unspecialized cells These cells have the potential to grow into a whole new plant
Slide 9 - Strawberry plants making asexual clones Whole new plants grow at the end of the runners How is this Possible?
Slide 10 - Sexual reproduction Information (genes) from 2 parents in the sperm and egg
Slide 11 - Sexual Reproduction in Plants Pollen carries genes from the male part of plants this fertilizes the ovule (female sex cell) POLLEN ovary containing OVULE
Slide 12 - Sexual reproduction gives variation
Slide 13 - Cloning mammals Sexual reproduction produces variation not clones. Why?
Slide 14 - Identical Twins Sperm fertilizes egg Fertilized egg starts to divide into a embryo, but the cells separate and each cell becomes a baby
Slide 15 - Clones can be made naturally… Identical twins are clones of each other fertilisation Fertilised egg cell splits Sperm cell Egg cell Baby Baby
Slide 16 - Twin Welsh Lambs Clones of each other but not of their parents
Slide 17 - Recently cloned animals
Slide 18 - Dolly The Sheep Hello Dolly Dolly was the first mammal cloned from an adult cell. She was born in 1996 and died in 2003. She was 6 when she died, about half the usual age for a sheep
Slide 19 - Making Dolly the sheep
Slide 20 - Problems with cloning mammals Dolly developed premature arthritis and showed signs of aging too quickly She died 6 years old which is half the natural age of a sheep She is now owned by the National Museum in Scotland
Slide 21 - Reproduction and Cloning Recap 1. Are Sonny and Cher clones? Explain your answer. 2. If I wanted to clone Sonny how would I do it? 3. What problems may I encounter if I try to clone Sonny.
Slide 22 - Next lesson Uses of cloning Should we clone mammals? Will we clone humans? What would this mean?
Slide 23 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.