Although specific genes seem to be involved in personality, the effects of these genes on behavior are small.Why?

Question

Quizplus · Accepted Answer

Multiple genes are involved in personality and they can interact in complex ways, sometimes acting in opposite directions. This makes it difficult to isolate the effects of individual genes on behavior, and explains why the effects of genes on personality traits are small. Environmental factors, like culture, can also play a role in shaping behavior, but they do not necessarily override genetic effects. Free will may be important in shaping behavior, but it is not directly related to the role of genes in personality. There is no evidence to suggest that genetic effects weaken over time.

Although Specific Genes Seem to Be Involved in Personality, the Effects