spindle collapse during meiosis I spindle collapse during meiotic prometaphase I 2021-05-11T15:07:10Z meiotic spindle breakage during prometaphase I broken meiotic spindle during prometaphase I spindle collapse during prometaphase of meiosis I meiotic spindle collapse during prometaphase I spindle collapse during prometaphase I A cell phenotype in which a short spindle assembles during the first meiotic nuclear division, and may begin elongation, but does not elongate normally or completely, and collapses during prometaphase I. Upon collapse the spindle may break or shrink. meiosis I spindle collapse during prometaphase midori FYPO:0007751