3. Behavioral Genetics: Behavior geneticists, wielding adoption and twin approaches, generated scads of studies. Collectively, the research consistently showed that genetics plays a major role in a gamut of domains of behavior. (a) Name at least six of the behavioral areas with links to genes. (b) Do genetic influences on behavior tend to directly affect the behaviors in question?; Twin studies of behavioral genetics are not without criticism. (c) Summarize the debate regarding the assumption that dizygotic (DZ) and monozygotic (MZ) twins differ only in terms of shared genes. (d) How do twin types differ in their prenatal environments? (e) How might this affect heritability estimates? (5 points) 4. Genetic Heritability & Environmental Influences: (a) Describe the definitions and differences between whether a trait is "inherited" and the degree of its "heritability".; Sapolsky provides two in-depth examples (the traits of: having five fingers, and wearing earrings) to help differentiate inheritance from heritability. b) Provide one brief example of your own for each concept.; Study a gene in only one environment and, by definition, you've eliminated the ability to see if it works differently in other environments. And thus you've artificially inflated the importance of the genetic contribution. (c) Why is this especially important in regard to studies of humans?; Usually, these questions are presented in the order in which they appear in the text. But in this case, the following question is sourced from a much earlier point in the chapter: (d) Briefly summarize each of the four types of environment pertaining to DNA transcription regulation (p. 226).; The rest of this section is sourced from material starting later in the chapter (pp. 245-249): (e) What was Sapolsky's "rule of thumb" for recognizing gene/environment interactions? (f) What "radical conclusion" do gene/environment interactions suggest? (7 points)