Presentation on theme: "Modifying Genes How can they be changed? 1. Genetic Engineering Replacing genes for desired traits… ◦ Must know exact location Gene map (genome project)"— Presentation transcript:
February 2004 242 donor eggs --> 30 blastocysts --> 1 stem cell May 2005 181 donor eggs --> 31 blastocysts --> 11 stem cells 10 donor eggs fused with skin cells from 9 patients with spinal injuries & 1 with diabetes all formed embryonic cell layers and each was compatible with patients immune systems and was genetically matched to donors.
2. Selective Breeding Method of artificially selecting and breeding only organisms with a desired trait to produce the next generation. Most all domesticated animals and most crop plants
2. Selective Breeding Hybridization: Combining two desired traits of an org. into one generation Usually between two diff (but similar) species.
Plant breeders can cross a large yellow pepper and a small red pepper to create a hybrid that is large and red. In this case the traits for size and red color are dominant (yellow is a recessive trait). Traits like nutritional levels operate under the same laws, but are far more complex to work with.