Distribution of meiotic recombination events: talking to your neighbors

Accurate chromosome segregation during meiosis is essential for a species’ survival. Therefore, a series of events unfold during meiosis, including pairing, synapsis, and recombination between homologous chromosomes, to ultimately ensure the successful completion of this task. This review will focus on how the regulation of crossover recombination events between homologous chromosomes plays a key role in promoting faithful segregation. Although our understanding of the molecular mechanisms by which crossovers are formed has increased significantly, the mechanisms governing the distribution of crossovers along meiotic chromosomes remain largely mysterious. Here, we review the different levels of apparent control of meiotic crossover formation and distribution.