13-1 Changing the Living World

1. Name two breeds of dog mentioned in the first paragraph: ______________________________________

2. What process resulted in all the different breeds of dogs? ______________________________________

3. Define hybridization: ___________________________________________________________________

4. The continued breeding of individuals with the same characteristics is called_______________________

5. What is the risk of inbreeding? ____________________________________________________________

6. Breeders can increase the genetic variation in a population by inducing _______________________

7. Describe a type of bacteria that has been mutated to be useful: _______________________________________________________________________________________

8. A polyploidy plant has many sets of ____________________________________

9. Give an example of a polyploidy plant:__________________________________

13-2 Manipulating DNA

10. DNA can be manipulated by using different techniques are used to

a. extract DNA from cells
b. ________________________________________________________
c. identify sequences of bases
d. _________________________________________________________

11. DNA can be extracted from cells using a simple ______________________ procedure.

12. A _________________________ ______________________ is used to cut DNA into small fragments.

13. ________________________ ___________________________ is used to separate DNA.

14. What happens when an electric current is applied to DNA fragments? ___________________________

15. The enzyme that copies DNA is called DNA __________________________________________

16. Dye is added to the unknown sequence of DNA, each base then has a different ___________________ and a different length.

17. Recombinant DNA molecules include natural DNA and ______________________________ DNA.

18. The polymerase chain reaction is used to do what? ________________________________________

19. DNA polymerase makes copies of DNA between the ____________________________________

20. Where did the enzyme used in PCR come from? _______________________________________