2. Why are the medial preoptic area and ventromedial nucleus better thought of part of extended networks than sexual "centers"?

3. Explain how the work of Dorner and Roeder illustrates how biological explanations of sexual orientation can lead to more negative treatment of homosexuals. What was the effect of the operations, and what is LeVay's explanation?

4. What is a "sexual dimorphism" and how do these relate to the search for a biological explanation for sexual orientation?

5. What key discovery was made by Roger Gorski? Explain this.

6. What expected dimorphism has so far not been found?

7. What is INAH, and which one has been found to be most sexually dimorphic?

8. What discovery did LeVay make about the brain and sexual orientation?

9. Discuss three limitations of LeVay's INAH studies.

10. Explain Larua Allen's discovery of a second brain difference between gay and straight men.

11. Who is William Byne, and what is LeVay's attitude toward him? List and explain his four criticism's of LeVay's work, the two that he has since retracted, and the one that LeVay himself shares. Which key criticism remains?