All of the following occur during mitosis except the Naim 01:55 AP Biology Practice Questions All of the following occur during mitosis except the A) condensing of chromosomes until they become visible. B) uncoupling of chromatids at the centromere. C) formation of a spindle. D) synthesis of DNA. E) disappearance of the nucleolus Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+