联会与联会复合体 EPTOTENE PACHYTENE chromatid 1 paternal /60 sister chromatids assembling disassembling I chromatid 2 central element 川 mimmmntHlIllIlIllIlI of synaptonemal protein axes (lateral elements) complex chromatid 3 maternal sister chromatids chromatid 4 INTERPHASE DIPLOTENE ZYGOTENE FOLLOWED BY DIAKINESIS TIME18 联会与联会复合体