What are the basic arguments made by “trait” (that is, biological) theories of crime, and what are their public policy implications?

What are the basic arguments made by “trait” (that is, biological) theories of crime, and what are their public policy implications? According to geneticist Steve Jones, Gareth Davies, Quest/KQED, and the textbook, what are the limitations of biological theories of crime, and what is the empirical evidence that goes against these theories? In view of what you’ve read, where do you stand in this debate?