Maternal and parental chromosomes are separated in Anaphase I of meiosis cell division. So sister chromatids are hold together in the Anaphase I. The Anaphase II is responsible for the separation of sister chromatids to form chromosomes. Sister chromatids are chromosomes of either maternal or paternal. Solution Maternal and parental chromosomes are separated in Anaphase I of meiosis cell division. So sister chromatids are hold together in the Anaphase I. The Anaphase II is responsible for the separation of sister chromatids to form chromosomes. Sister chromatids are chromosomes of either maternal or paternal..