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Seeking social genes

In order understand the evolution of complex societies, researchers are sequencing the genomes of social insects. The most recent data, published this week in the Early Edition of Proceedings of the National Academy of Sciences, come from several sp…

At the crossroads of chromosomes

PHILADELPHIA — On average, one hundred billion cells in the human body divide over the course of a day. Most of the time the body gets it right but sometimes, problems in cell replication can lead to abnormalities in chromosomes resulting in m…