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Published byGordon Carson Modified over 9 years ago
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They want desirable traits from these organisms, for example: ◦ Bright, colorful flowers ◦ Pesticide resistant vegetable and fruit crops that can live longer ◦ Strong, powerful farm animals, race horses, or perfect-looking show dogs
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There are three methods of developing organisms with desirable traits: ◦ Selective breeding ◦ Cloning ◦ Genetic Engineering
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The process of selecting a few organisms with desirable traits to serve as parents of the next generation. There are two types (inbreeding and hybridization) ◦ Increases the value of plants and animals to people Dairy cows produce more milk Larger, juicer strawberries Faster, stronger race horses
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This 1 st selective breeding process crosses two individuals that have identical or similar sets of alleles. ◦ Goal is to produce breeds of animals with specific traits Mating strong purebred German Sheppard police dogs with the same traits to produce puppies that are very similar genetically.
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This 2 nd selective breeding process crosses two individuals that have genetically different sets of alleles. ◦ Goal is to produce breeds of animals with a combination of specific traits Taking a fast horse and matting it with a tall horse in hopes that the baby horse will be tall and fast.
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Genetically Identical copies
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Sexual reproduction produces variation not clones. Why?
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Hello Dolly 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
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Transferring a gene (or more) from the DNA from one organism to the DNA of another organism. Why? Produces medicines, improve crops, and may cure genetic disorders.
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