This approach ignores the interactions of the individual with the environment. Research shows that most people, who have suspect genetic traits, are not deviant. Furthermore, the vast majority of criminals do not have irregular genetic patterns. Perhaps the very fact that persons look different that the general population draws attention to those people. When that individual does something deviant, attention is already focused upon that individual.
Previous suspicions become justified.
A new type of sociobiological theory tries to apply positivist philosophy to street crime. The general argument here is that it requires stamina to be a criminal so those people with the most stamina will be more likely to commit crimes. This would include the young and men. Other biological theories look for links between higher rates of aggression in men to levels of testosterone or chromosomal abnormality. Functionalism Functionalist theories focus on the preservation of social order.