abnormal spindle morphology during meiosis I monopolar spindle during meiosis I midori V-shaped spindle during meiosis I fan-shaped spindle during meiosis I FYPO:0006363 monopolar spindle during first meiotic nuclear division A physical cellular phenotype in which the spindle forms with microtubules emanating from only one pole during the first meiotic nuclear division. 2018-02-06T15:03:58Z Note that an abnormal spindle organization process may, but does not necessarily, result in abnormal spindle morphology.