Can behavior be controlled by genes? The case of honeybee work assignments

In an article published in the advance online edition of Genes, Brain and Behavior on April 6, 2012, a biologist at Washington University in St. Louis and his colleagues demonstrate that the division of labor among honeybees is correlated with the presence in their brains of tiny snippets of noncoding RNA, called micro-RNAs, or miRNAs, that suppress the expression of genes.