Multiple Choice
During the cell cycle associated with mitosis, in which phase does DNA replication occur?
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9. Mitosis and Meiosis
Mitosis
Multiple Choice
During prophase of mitosis, what happens to the cell’s DNA?
A
It condenses into visible chromosomes, each consisting of two sister chromatids joined at a centromere.
B
It aligns as individual chromosomes along the metaphase plate.
C
It replicates to form identical copies of each chromosome.
D
It separates so sister chromatids move to opposite poles of the cell.
Verified step by step guidance1
Recall the stages of mitosis and the key events that occur in each phase, focusing on prophase.
Understand that during prophase, the chromatin (DNA and proteins) condenses to form visible chromosomes, which are easier to separate later.
Recognize that each chromosome at this stage consists of two sister chromatids joined at a centromere, as DNA replication has already occurred during the S phase of interphase.
Note that alignment of chromosomes along the metaphase plate happens in metaphase, not prophase.
Remember that separation of sister chromatids occurs during anaphase, not prophase.
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