In meiosis, the association of four homologous chromatids seen during the pachytene stage of prophase. ( genetics) used of homologous chromosomes associated in pairs in synapsis. 减数分裂前期的粗线期中,四个同源的染色单体向联系形成的结构。(遗传学)属于在成熟分裂时联在一起的一对同源染色体。
At the stage of meiosis prophase, microspore mother cell begin to accumulate callose wall. 小孢子母细胞在减数分裂前期时开始积累肼胝质壁;
Studies on the mutagen effects of the early stage of meiosis prophase on barly 大麦减数分裂早前期诱变效应的研究