Difficulty: Easy

Average Score: 83%

Which statement is true regarding mitosis?

Rationale

During anaphase, the chromatids separate and move to opposite poles.

Anaphase is a critical stage in mitosis where the sister chromatids, previously aligned at the metaphase plate, are pulled apart by spindle fibers and move toward opposite ends of the cell. This separation ensures that each new daughter cell will receive an identical set of chromosomes.

A (During telophase, the chromosomes align in the center of the cell.) YOUR ANSWER

This statement is incorrect because during telophase, the separated chromatids reach the opposite poles of the cell and begin to de-condense. The alignment of chromosomes in the center of the cell occurs during metaphase, not telophase.

B (During metaphase, the chromosomes condense.) YOUR ANSWER

While it is true that chromosomes are condensed and visible during metaphase, the process of condensation actually occurs earlier, during prophase. Metaphase is characterized by chromosomes being aligned at the metaphase plate, not by the condensation of chromosomes.

C (During prophase, the chromosomes become uncondensed and two new nuclei are formed.) YOUR ANSWER

This statement is incorrect because, during prophase, chromosomes condense and become visible, and the nuclear envelope begins to break down, not form two new nuclei. The formation of two new nuclei occurs later during telophase, after the chromatids have been separated.

Conclusion

Mitosis is a well-defined process divided into several stages, each with specific events. Anaphase is the key phase where chromatids separate and move to opposite poles, ensuring accurate distribution of genetic material to the daughter cells. Understanding these phases helps clarify the overall mechanism of cell division and its importance in growth and repair.

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