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Thread: Genetic Link Found to Criminal Behavior

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    Genetic Link Found to Criminal Behavior

    No word about whether these genes are more predominant in certain populations, though I highly suspect there are, and this information will eventually find it's way out.

    Three genes may play a strong role in determining why some young men raised in rough neighborhoods or deprived families become violent criminals, while others do not, U.S. researchers reported on Monday. One gene called MAOA that played an especially strong role has been shown in other studies to affect antisocial behavior -- and it was disturbingly common, the team at the University of North Carolina reported.

    People with a particular variation of the MAOA gene called 2R were very prone to criminal and delinquent behavior, said sociology professor Guang Guo, who led the study. "I don't want to say it is a crime gene, but 1 percent of people have it and scored very high in violence and delinquency," Guo said in a telephone interview.

    His team, which studied only boys, used data from the National Longitudinal Study of Adolescent Health, a U.S. nationally representative sample of about 20,000 adolescents in grades 7 to 12. The young men in the study are interviewed in person regularly, and some give blood samples. Guo's team constructed a "serious delinquency scale" based on some of the questions the youngsters answered. "Nonviolent delinquency includes stealing amounts larger or smaller than $50, breaking and entering, and selling drugs," they wrote in the August issue of the American Sociological Review.

    "Violent delinquency includes serious physical fighting that resulted in injuries needing medical treatment, use of weapons to get something from someone, involvement in physical fighting between groups, shooting or stabbing someone, deliberately damaging property, and pulling a knife or gun on someone."


    GENES PLUS ENVIRONMENT

    They found specific variations in three genes -- the monoamine oxidase A (MAOA) gene, the dopamine transporter 1 (DAT1) gene and the dopamine D2 receptor (DRD2) gene -- were associated with bad behavior, but only when the boys suffered some other stress, such as family issues, low popularity and failing school. MAOA regulates several message-carrying chemicals called neurotransmitters that are important in aggression, emotion and cognition such as serotonin, dopamine and norepinephrine.

    The links were very specific. The effect of repeating a grade depended on whether a boy had a certain mutation in MAOA called a 2 repeat, they found. And a certain mutation in DRD2 seemed to set off a young man if he did not have regular meals with his family.

    "But if people with the same gene have a parent who has regular meals with them, then the risk is gone," Guo said. "Having a family meal is probably a proxy for parental involvement," he added. "It suggests that parenting is very important." He said vulnerable children might benefit from having surrogates of some sort if their parents are unavailable.

    "These results, which are among the first that link molecular genetic variants to delinquency, significantly expand our understanding of delinquent and violent behavior, and they highlight the need to simultaneously consider their social and genetic origins," the researchers said. Guo said it was far too early to explore whether drugs might be developed to protect a young man. He also was unsure if criminals might use a "genetic defense" in court. "In some courts (the judge might) think they maybe will commit the same crime again and again, and this would make the court less willing to let them out," he said.
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    This is old news to anyone who doesn't buy into the socialists' claim that crime is the result of poverty. I'm waiting for them to "discover" (what anyone with half a brain can figure out for himself) that these antisocial tendencies and criminal behaviour aren't simply genetical, but also hereditary. Sadly, even with such confirmation, today's moronic governments wouldn't lift a finger to do anything about it. But it's always fun to get confirmation from the scientific community that good ol' common sense can stump their ideologically produced fallacies.

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    Nice to see that what we know is confirmed.

    I thought the eating meals with family part worth commenting on. Even the simplest of family traditions help protect children and youths. Family involvement does not change the genes that can be passed on but it can prevent a child from 'going wrong' most of the time.
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    Quote Originally Posted by SwordOfTheVistula View Post

    No word about whether these genes are more predominant in certain populations, though I highly suspect there are, and this information will eventually find it's way out.
    Could you imagine the outcry if it was? It's bad enough trying explain to people about IQs.
    "The only way to get smarter is to play a smarter opponent."

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    This is what exponents of biological determinism have been saying for years.

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