1. How are genetic polymorphisms used to distinguish populations?

2. Why is the Y chromosome (and not some other chromosome) particularly useful in this endeavor?

3. What evidence is there that Africans, certain Indians and Australian aborigines are related?

4. What have you learned from this film about how the environment affects human physical differences?

5. Where does Dr. Wells suggest that the ancestors of Europeans came from? Why did they move?

6. If Africa is the “cradle” of humanity, Dr. Wells suggests that central Asia was its “nursery”. What evidence does he offer to support this statement?

7. Who are the Chukchi? How and why did they get to be where they are? To whom are they related?

8. How does Wells suggest that the Chukchi stay warm?

9. How did Northeastern Siberian peoples get to the Western Hemisphere? What made it possible?

10 What have you learned about the length of time it takes for major phenotypic changes to become fixed in a population, when the population adapts to extreme environments (high altitude, cold, heat, UV radiation, etc.)?