sister kinetochore dissociation in meiotic metaphase I with equational sister chromatid segregation in meiosis I equational sister chromatid separation during first meiotic nuclear division A cellular process phenotype in which sister kinetochores become separated during the first meiotic nuclear division, and sister chromatids subsequently separate to result in equational segregation. Equational sister chromatid separation is caused by bi-orientated attachment of sister chromatids. 2016-08-24T14:58:54Z FYPO:0005634 abnormal chromosome segregation during meiosis I with premature sister kinetochore separation and equational sister chromatid separation increased bi-orientated attachment of sister chromatids in meiosis I equational sister chromatid separation in meiosis I equational sister chromatid separation during meiosis I with split kinetochores abolished monopolar kinetochore attachment during meiosis I midori Sister kinetochores may separate in meiosis I due to problems with either sister chromatid cohesion or kinetochore attachment to microtubules. Therefore consider also annotating to 'abnormal attachment of spindle microtubules to kinetochore involved in homologous chromosome segregation' (FYPO:0000209), 'decreased meiotic sister chromatid cohesion' (FYPO:0002093), or 'merotelic kinetochore attachment during meiosis I' (FYPO:0005638). This term describes the premature separation of paired, intact sister kinetochores. It has a related synonym using "split kinetochores" because that phrase is often used in the literature to describe this phenotype. It should not be confused with the FYPO terms that have "split kinetochore" in the names, because those names refer to cases where a single kinetochore has broken into parts. sister kinetochore dissociation in meiotic metaphase I equational sister chromatid separation at meiosis I