sister chromatid nondisjunction at meiosis II sister kinetochore dissociation in meiotic metaphase I, normal chromosome segregation in meiosis I, and sister chromatid non-disjunction in meiosis II premature sister kinetochore separation and normal chromosome disjunction in meiosis I, and unequal sister chromatid disjunction in meiosis II A physical cellular phenotype in which sister kinetochores separate during the first meiotic nuclear division, homologous chromosomes undergo normal reductional division, but sister chromatids divide unequally in meiosis II. Normally sister kinetochores remain together until meiosis II. Normally sister kinetochores remain together until meiosis II. FYPO:0005633 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. precocious centromeric dissociation during meiosis I and normal chromosome division in meiosis I, and unequal sister chromatid segregation in meiosis II midori abnormal chromosome segregation during first meiotic nuclear division with premature sister kinetochore separation, reductional chromosome separation, and unequal sister chromatid division 2016-08-24T14:57:44Z abnormal chromosome segregation during meiosis I with premature sister kinetochore separation, reductional chromosome separation, and unequal sister chromatid division sister kinetochore dissociation in meiotic metaphase I