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more and more, scientists think that genes play a key role in our personalites -- even perhaps in the candidates we choose. scientists say that when you step into a voting booth you have only a partial decision. and that's your parent's fault. a class at vanderbilt university (usa) is studying the role genetics plays in political decisions. the research, conducted across the country, is shedding light on how our candidate of choice might not be entirely our own choosing. dr. david bader, a vanderbilt biology professor says that ge- netics have some role in how we think about politics. "it's not just socialization, it's not just nurture," he says. "there are really differences in people. i think it's silly to say genes don't play a difference." so the question is whether our political views are entirely a product of the people around us or whether we have already cho- sen our candidates without even realizing it. dinner the verdict lies somewhere in the middle. "your genotype doesn't define you," bader says. "it may put you on a general- ized path, but is there a single gene of whether you are a conser- vative or liberal? i would sincerely doubt that." but liberals and conservatives do have differences that may not be dictated by choice, according to a new york university study by psychology professor david amodio. amodio was the lead author of a study that analyzed how self-proclaimed liber- als and conservatives use a portion of the brain that activates when a person gets information or ideas contrary to his established beliefs. the study showed that liberals' use of that portion of the brain was higher than that of conservatives, which suggests that liberals are more responsive to different ideas. the report says that more liberal people tend to be able to deal with pros and cons of decisions, and as they get more conservative, people like to focus on one side of the story. of course, conservatives could argue they are more determined in their beliefs. they could say it is more difficult to persuade them by argument. so bader and his class have raised a lot of questions. genetic data are becoming important for future campaigns that could use such studies to support their arguments and to convince voters they support a certain party due to their genes. as we learn more and more, it's more important that your genetic data should be a private thing. but as research moves forward genetic information is likely become more available. genetic analyses that now cost about $1,000 could be available in shopping malls in 10 years. the scientists say they will stick to examining the relation- ship between the science and our votes. "the question of what to do with the information is one for society," bader says. "the question of how we get the information is one for science."