Abstract

Chromosome segregation during mitosis and male meiosis is mediated by centrosomal spindles that require the activity of the aurora A kinase, whereas female meiotic spindles of many species are acentrosomal. We addressed the role of the C. elegans aurora A kinase, AIR-1 , in acentrosomal spindle assembly by generating a strain in which AIR-1 is tagged with both an auxin-induced degron and HALO tag. The meiotic spindle pole marker, MEI-1 , and chromosomes were labeled with GFP and mCH::histone respectively. All meiotic spindles were bipolar in AIR-1 depleted embryos, however an increase in lagging chromosomes was observed during anaphase.

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