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The Language of the GenesMany claims that particular genes are associated with mental diseases such as schizophrenia or depression have not been sustained on further study. In spite of plans for huge (and expensive) sweeps through the genetic undergrowth, with thousands of sick people scanned to sec if their DNA is special, the chances of success in the search for the genes involved are small. As a result genetics will have less of a role in the diagnosis and treatment of common disease than is often claimed. What it may do first is to show that what once appeared to be single illnesses — from schizophrenia to obesity — are in fact many, each of which might need a separate treatment. As a result, the prospect of screening whole populations for those at risk is far away. Even so, the science can bring unwelcome news to some. Many inherited diseases cannot be treated even if they are diagnosed, which at once raises the question as to who would want a test. Half of those who have a parent with Huntington's disease may contract it ...» |
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