which of the following does NOT occur during mitosis

Question

anonymous · Answer

A) centromeres split
B) chromosomes replicate
C) spindles form

anonymous · Answer

I think its B. Just a guess..

anonymous · Answer

@Irs96 The answer is B.

anonymous · Answer

@MissMissy The centeromeres are the what joins the chromatids together and are split during mitosis. The spindles help anchor and pull chromosomes in mitosis. DNA, however, must be replicated before mitosis. If it was not, you would end up with cells that are 1/2 the chromosome copy number of the parent. EG, if the parent cell was diploid, the two daughter cells would then be haploid.  

The situation I just described, DNA not being duplicated prior to mitosis, is what is thought to have occurred in the evolution of meiosis.  It is thought that it meiosis may have evolve by cells going through mitosis and then those daughter cells undergoing mitosis-like processes again, without DNA duplication (essentially skipping the S phase).

anonymous · Answer

@lrs96 Hope my post above helped.

anonymous · Answer

@MissMissy Oh, sorry MissMissy. I just realized I thought you had given an incorrect answer, so I tagged you so that you could get the correct info for your future studies. You, however, did not give an incorrect answer. Sorry.

abhisar · Answer

@mrdoldum is correct the , The DNA gets replicated prior to mitotic cycle in the interphase.

anonymous · Answer

@mrdoldum It's all good.