Artificial Selection
Dec 28, 2015
Artificial Selection
•People (instead of nature) select which organisms get to reproduce and which traits have a better chance of being passed on•No longer matters what is
“most fit”
Purpose of artificial selection
•Higher yield of offspring in plants• Improved quality•Reduced production costs• Faster growth rates•Greater resistance to diseases•Cosmetic•Hypoallergenic
Who participates in artificial selection?
• Farmers• All crops
•Breeders• Farm animals• Dogs• Horses
• Scientists
Examples of artificial selection• Dogs• Originally domesticated for hunting, shepherding, and pest
control. • Eventually became companion animals
Genetic Modification / Genetic Engineering
-Genetic engineering techniques are used to alter DNA
-DNA is altered and combined with other DNA to create an entirely new set of genes
-Creates genetically modified organisms (GMO’s)- Occurs everywhere
- 85% of US corn and 91% of US soybeans are genetically engineered
Artificial Selection versus Genetic Modification
•Which one is more effective?•Genetic Modification/Engineering•Quicker•More Effective•No limitations
Weird examples of genetic engineering
• For each of the examples try to answer the following questions•Do you support the example?• Should we continue to genetically engineer
organisms?