Multiple Choice
During which phase of mitosis do chromosomes first become visibly condensed?
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16. Cell Division
Mitosis
Multiple Choice
Which of the following events does NOT occur during mitosis?
A
Separation of sister chromatids to opposite poles of the cell
B
Condensation of chromatin into visible chromosomes
C
Replication of DNA to produce sister chromatids
D
Alignment of duplicated chromosomes at the metaphase plate
Verified step by step guidance1
Step 1: Understand the phases of the cell cycle, focusing on mitosis and interphase. Mitosis is the process where a single cell divides its duplicated chromosomes into two identical sets, while DNA replication occurs before mitosis during the S phase of interphase.
Step 2: Identify the key events that happen during mitosis: (a) condensation of chromatin into visible chromosomes, (b) alignment of duplicated chromosomes at the metaphase plate, and (c) separation of sister chromatids to opposite poles of the cell.
Step 3: Recognize that DNA replication to produce sister chromatids does NOT occur during mitosis but rather during the S phase of interphase, which precedes mitosis.
Step 4: Compare each event listed in the problem to the known timeline of the cell cycle to determine which event is out of place during mitosis.
Step 5: Conclude that the event 'Replication of DNA to produce sister chromatids' does not occur during mitosis, distinguishing it from the other events that are characteristic of mitosis.
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