Final answer:
From the chapter's discussion, the idea that sexual orientation is conclusively genetically determined is not a key takeaway, as there is no scientific consensus or conclusive evidence for this claim. Other concepts such as the influence of culture and the variability of sexual interests are considered key ideas.
Step-by-step explanation:
All the following are key ideas to take away from this chapter's discussion of sexual orientation except this one: there is conclusive scientific evidence that sexual orientation is genetically determined. The chapter discusses how sexual desires and experiences have different meanings across individuals and groups, acknowledges the diversity of sexual interests within any society, and emphasizes the role of culture in shaping sexual norms. However, it also states that there is no scientific consensus on the exact causes of sexual orientation and no conclusive evidence that sexual orientation is solely determined by genetics. While there have been studies suggesting that genetics may play a part, they do not indicate a purely genetic basis for sexual orientation.