Monopolar attachment of sister kinetochores at meiosis I requires casein kinase 1.

The segregation of maternal centromeres away from the paternal ones during the first division of meiosis depends on the attachment of sister kinetochores to microtubules emanating from the same spindle pole在减数分裂（meiosis）的第一次分裂过程中，母源着丝粒（centromere）与父源着丝粒的分离，有赖于姐妹动粒（kinetochore）与同一纺锤体极（spindle pole）发出的微管（microtubule）的附着作用。