During meiosis, oocytes must attach homologous chromosomes to opposite spindle poles, but the cells take several hours to assemble a bipolar spindle. Gluszek et al. reveal that, in Drosophila oocytes, the microtubule catastrophe–promoting protein Sentin delays the formation of stable kinetochore–microtubule attachments until spindle assembly is complete, thereby preventing homologous chromosomes from incorrectly attaching to the same spindle pole. This biosights episode presents the paper by Głuszek et al. from the December 21st, 2015, issue of The Journal of Cell Biology and includes an interview with the paper's senior author, Hiroyuki Ohkura (University of Edinburgh, Edinburgh, Scotland, UK). Produced by Caitlin Sedwick and Ben Short. See the associated paper in JCB for details on the funding provided to support this original research.
0