spindle collapse during meiosis I spindle collapse during meiotic prophase I 2021-05-11T13:28:16Z midori broken meiotic spindle during prophase 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 prophase I. Upon collapse the spindle may break or shrink. spindle collapse during prophase of meiosis I FYPO:0007744 meiotic spindle breakage during prophase I spindle collapse during prophase I of meiotic cell cycle