1. Review Give and example of selective breeding
Review what is the relationship between genetic variations and mutations.
Explanation Write a paragraph in which you suggest ways that plants could be genetically altered to improve the world’s food supply

2. Ch 15 Genetic Engineering
15.1 Selective Breeding

3. Selective Breeding
Method of breeding where the organisms that breed are picked due to certain traits
People have done this for a long time with many species
Native Americans selectively bred teosinte to produce corn.

4. Hybridization
Crossing dissimilar individuals to bring together the best of both organisms
Individuals produced by such crosses are often hardier than either of the parents
Can increase the disease resistance or increase food production.

5. Inbreeding
Continued breeding of individuals with similar characteristics
Useful in preserving certain traits- dog breeds
Increases the chance that a cross between two individuals will bring together two recessive alleles for a genetic defect.

6. Biotechnology
Application of a technological process, invention, or method to living organisms.

7. Increasing Variation

8. Mutations Ultimate source of biological diversity Occur spontaneously
Breeders can increase the mutation rate using radiation or chemicals
Used often with bacteria.

9. Polyploid Plants Given drugs to prevent chromosomes from separating
Often are larger and stronger.