Question

what is an advantage of an adoption study in determining the level of genetic inheritance on behaviour?
a. the researcher can eliminate genetics as a factor since the participants were not raised by their biological parents.
b. it is not required to get consent since the individual would not know that he is adopted.
c. the researcher can determine the role of environmental and genetic factors by seeing if the adopted children share the behaviours of their biological parents.
d. it is easier to get samples for adoption studies than for twin studies.

Explanation:

Adoption studies separate genetic and environmental influences by comparing adopted children's behavior to their biological (genetic) and adoptive (environmental) parents. Option A is incorrect because these studies aim to measure genetics, not eliminate it. Option B is wrong as consent is still required regardless of the individual's knowledge of adoption. Option D is incorrect because twin studies are generally easier to recruit for than adoption studies. Option C correctly describes the core advantage: by seeing if adopted children share behaviors with their biological parents, researchers can disentangle genetic vs. environmental impacts on behavior.

Answer:

C. The researcher can determine the role of environmental and genetic factors by seeing if the adopted children share the behaviours of their biological parents.