Sister chromatids are held together through metaphase of mitosis by complexes of cohesin proteins that form rubber band-like rings bundling the two sister chro matids. cohesin rings are found both at centromeres and at many locations scattered along the length of the chromosomes. the rings are destroyed by protease enzymes at the beginning of anaphase, allowing the sister chromatids to separate. a. cohesin complexes between sister chromatids are also responsible for keeping homologous chromosomes together until anaphase of meiosis l. with this point in mind, which of the two diagrams that follow (i or ii) properly represents the arrangement of chromatids during prophase through metaphase of meiosis l? explain. b. what does your answer to part (a) allow you to infer about the nature of cohesin complexes at the centromere versus those along the chromosome arms? suggest a molecular hypothesis to explain your inference.