1. Selective Breeding

2. Selective Breeding
Humans have used _____________ patterns that occur naturally in dogs to pass on desired traits to the next generation. This is called selective breeding.
Selective breeding has been used to produce faster race horses, new varieties of plants, etc.

3. Inbreeding
This type of selective breeding is used to maintain certain traits in offspring.
___________ individuals are crossed in order to increase the chance of the offspring having the traits of their parents.

4. Inbreeding
This sometimes causes problems because it increases the chance that an offspring will inherit two __________ alleles that may cause a genetic defect.

5. Inbreeding
For example, some German shepherds and Labrador retrievers have joint problems because of too much inbreeding.

6. Hybridization
This is where two individuals with _________________ traits are crossed in hopes of getting the best traits from both parents.

7. Hybridization
Suppose there was a type of corn that was very drought resistant and another type of corn that had a great flavor. What would you hope to get by crossing those two varieties?

8. Examples of Hybrid Animals
Liger

9. Examples of Hybrid Animals
Zebra horse
Mule

10. Genetic Engineering
This is where scientists take bits of ___________ material from one organism and insert it into another.
They hope to someday use this technique to cure genetic disorders.
YouTube - Genetic Engineering Animation

11. Genetic Disorders
_____________

12. Cloning
This involves using the genetic information from one organism to produce an exact _________ of that same organism.
A sheep named Dolly was the first mammal cloned.