The diagram shows cells in different phases of mitosis. A student is trying to find a cell in a particular phase of mitosis. The student is looking for evidence that the spindle fibers are separating the chromosomes to ensure that each new nucleus has one copy of each chromosome

Through mitosis, a cell can divide and produce two identical daughter cells. The process occurs in four stages. During anaphase, chromatids sisters separate and migrate to the poles. The student is searching for cell 2.

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Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced.

First occurs duplication of the cell content, and then the separation into two new cells happens.

Mitosis occurs in only one phase.

In the prophase, it occurs chromosomes condensation and nuclear membrane breaks.

During the metaphase, chromosomes are taken toward the center of the cell by the spindle apparatus. Once in the equatorial plane, chromosomes line up.

Each chromatid joins with a microtubule of opposites poles.

In Anaphase, bonds between chromatids break. They separate and migrate to the opposite poles.

In telophase, duplicated chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole.

Immediately after mitosis, cytokinesis occurs.

The diagram shows

Metaphase → chromosomes in the equatorial plane
Anaphase → chromosomes migrating to the poles
Telophase → chromosomes already in the poles
The cell with the nuclear membrane and visible chromosomes

If the student is looking for evidence that the spindle fibers are separating the chromosomes, he must focus on cell number two, which is going through the anaphase.

Cell number two shows how the fibers of the spindle apparatus are driving chromatids to each pole.

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