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Study Links Smoking to Loss of Y Chromosome, Cancer

Male smokers are three times more likely than nonsmoking men to lose their Y chromosomes, according to research that may explain why men develop and die from many cancers at disproportionate rates compared to women. In a study in the journal Science, researchers at Sweden's Uppsala University found that Y chromosomes, which are important for sex determination and sperm production, more often disappear from blood cells of smokers than those of men who have never smoked or of men who...

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