Anaphase of Mitosis: During this phase of mitosis the centromeres divide, the spindle fibres contract and move towards opposite poles, pulling the daughter chromosomes apart.
Anaphase of meiosis-I: With the contraction of microtubules of the spindle apparatus each homologous chromosome with its two chromatids and unbroken centromeres (unlike anaphase of mitosis) start moving towards the opposite poles of the cell.