1. 2-22
Today’s Agenda…
Bellringer: Physical Science (Motion and Forces) Multiple Choice on Bellringer Sheet
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Turn in Open Response Question
Review Genetic Disorders
Notes on Advances in Genetics

2. Advances in Genetics
Study Pack #15

3. Advances in Genetics
Three methods that people have used to develop organisms with desirable traits are:
Selective breeding
Cloning
Genetic engineering

4. Selective Breeding
The process of selecting a few parents with desired traits to serve as parents of the next generation
Usually used to increase the value of a plant or animal

5. Selective Breeding One selective breeding technique is inbreeding
Crossing two individuals with identical or similar sets of alleles
Offspring are very similar to parent
Mendel used inbreeding to create purebred pea plants
Advantages? Disadvantages?

6. Selective Breeding Another technique is hybridization
Breeders cross two genetically different individuals
Offspring have best traits from both parents

7. Cloning
With selective breeding it is not CERTAIN that the desired traits will be passed on to offspring, remember that it is based on probability
A clone is an individual that is genetically IDENTICAL to the organism from which is it produced

8. Cloning In plants – cutting In animals
Take a small part of plant and it grows into a entirely new plant
In animals
Dolly was the first!

9. Genetic Engineering
Genes from one organism are transferred into the DNA of another organism
Used to produce medicines, to improve food crops, and to try to cure human genetic disorders

10. Gene Therapy Type of genetic engineering
Insert working copies of a gene directly into the cells of a person with a genetic disorder using viruses