LABORATORY REVIEW
MITOSIS AND MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The chromosomes separate and move along spindle fibers to opposite ends of the cell.
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The chromosomes, which were distinct and condensed, begin to spread out into a tangle of chromatin.
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The centromeres of the duplicated chromosomes line up across the center of the cell.
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The genetic material inside the nucleus condenses and the duplicated chromosomes become visible.
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Detailed explanation-1: -A student is labeling a diagram of mitosis. Which description should the student label as anaphase? The chromosomes separate and move along spindle fibers to opposite ends of the cell. The chromosomes, which were distinct and condensed, begin to spread out into a tangle of chromatin.
Detailed explanation-2: -Anaphase is the fourth phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.
Detailed explanation-3: -Hence, the correct option is (C) The centromeres separate at the onset of anaphase. Note: In mitosis, chromosomes start to condense in anaphase after the cell passes the spindle formation checkpoint and this allows the separation of chromosomes.
Detailed explanation-4: -Anaphase. After metaphase is complete, the cell enters anaphase. During anaphase, the microtubules attached to the kinetochores contract, which pulls the sister chromatids apart and toward opposite poles of the cell (Figure 3c). At this point, each chromatid is considered a separate chromosome.
Detailed explanation-5: -Which description should the student label as metaphase? The centromeres of the duplicated chromosomes line up across the center of the cell.