Which of the following does NOT occur during mitosis?

a) Centromeres split

b) chromosomes replicate

c) spindles form

Mitosis is the nuclear division plus cytokinesis, and produces two identical daughter cells during prophase, prometaphase, metaphase, anaphase and telophase. So base on that the answer would be letter C. spindle form. I hope you are satisfied with my answer and feel free to ask for more