Answer:
A-Anaphase.
Explanation:
It is divided to two phases of Anaphase A( migration of chromosomes to one of the poles of dividing cell,s & B.( separation of the poles to equator of the cells.)
The is the stage of cell division after metaphase, preceding telophase. it is the phase of splitting and migration new daughter chromatids to the opposite poles of the cells by kinotochore microtubes.The chromosomes also condense to mark the end of this stage.
It occurs in both mitotic and meiotic cell division,but different in meiosis I, but similar in meiosis II and mitosis.
Failure of separation and migration of replicated chromosomes and sister chromatids to opposite poles, result in many birth defects.This condition is called nondisjunction. E.g Down Syndrome.
It is marked with beginning of cleavage furrow formation.