Web Lesson: Cloning

Learn.Genetics at http://learn.genetics.utah.edu/
Under the "Genetic Technology" Menu, Click on "Cloning"

Browse the articles at the site to find the answers to the following questions.

What is Cloning?

1. Define Cloning: _________________________________________________

2. What is the difference between natural twinning and artificial twinning? ______________________________________

3. What is SCNT? ____________________________________________

4. To make Dolly the clone, they first isolated a cell from where? __________________________________

5. They transferred the nucleus of this cell to where? ____________________

Click and Clone

6. List all the materials needed to clone a mouse.

 

7. Place the following steps in the correct order.

________Stimulate cell division
________Deliver baby
________ Remove and discard the nucleus from the egg cell
________ Isolate donor cells from egg donor and germ cell donor
________ Transfer the somatic cell nucleus into the egg cell
________ Implant embryo into a surrogate mother

8. Explain how the nucleus is removed from the donor egg:

9. What color with the cloned mouse be? _____________ What is the name of this mouse? _____________________

Why Clone?

10. List the four main reasons given on the page for justifyig cloning:

_________________________________________________
_________________________________________________
__________________________________________________
__________________________________________________

11. What is a stem cell? ___________________________________________

12. What are two reasons a person might want to clone a human?

_______________________________________________________________

Cloning Myths

13. Briefly describe in your own words, why CC the cat was not identical in color to Rainbow, even though she was a clone?

 

14. Explain why Frank #2 might have a different personality than Frank #1.

 

Is it Cloning or Not?

15. For each of the following scenarios, indicate YES (it is cloning) or NO (it is not cloning)

___________Sperm taken from a mole goat is combined with a female's egg in a petri dish. The resulting embryo is implanted into the female's uterus to develop
___________A sheep embryo, composed of 16 cells, is removed from the mother's uterus and separated into indivudal cells. Each cell is allowed to multiply, creating 16 separate embryos, which are then implanted in different female sheep to develop to maturity.
___________A cow with many desirable traits is stimulated with hormones to produce a number of egg cells. Each of these eggs is fertilized and implanted into a surrogate mother.
___________ In vitro fertilization
___________ Cell nuclei from an extinct wolly mammoth are placed into enucleated cow cells.

 

What Are the Risks of Cloning?

16. What is one reason why cloning animals has such a high failure rate?

 

17. What is LOS? ______________________________________

18. What is a telomere? _________________________________

What Are Some Issues in Cloning?

19. Pick one of the questions to ponder and ....ponder it. Write a brief essay on your thoughts and opinions.