Question

question 3
why would you need a gene to stop the cell cycle?
if a cell had completed cytokinesis successfully
if a mutation occurred and the cell needed time to repair it before continuing
if a cell had completed dna replication successfully
if a cell had completed mitosis successfully

Explanation:

Cells have check - points in the cell cycle to ensure proper functioning. When a mutation occurs, the cell needs to stop the cell cycle to repair the DNA damage. If the cell continues dividing with damaged DNA, it can lead to genetic disorders or cancer. Completion of cytokinesis, DNA replication, or mitosis are normal progression points and do not require stopping the cell cycle.

Answer:

If a mutation occurred and the cell needed time to repair it before continuing