You watch one cell go trough the cell cycle. Now there are two cells, but you notice that one cell has extra chromosomes, and the other cell is missing chromosomes. What likely happened?

The cell missed the checkpoint at the end of the G2 phase which is where replication occurs.

Explanation:

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

the statement is true