The stage at which morphology of chromosomes is easily studied is the stage during which
Spindle fibres attach to kinetochores of chromosomes.
Metaphase is the stage at which morphology of chromosomes is most easily studied. The spindle fibres attach to kinetochores of chromosomes during Metaphase.
Nucleolus, Golgi complex and ER reform at the Telophase.
Centromeres split and chromatids separate at the Anaphase.
DNA duplicates during the S-phase