To determine which cell is going from metaphase into anaphase while looking through a microscope, we need to understand what these stages of mitosis entail.
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Metaphase: In this stage, chromosomes are aligned along the metaphase plate (the equatorial plane of the cell). The spindle fibers attach to the centromeres of the chromosomes, which are still connected at this stage.
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Anaphase: In this stage, the sister chromatids are pulled apart toward opposite poles of the cell. The connections at the centromeres are broken, and each chromatid becomes an individual chromosome.
If you are observing cells under a microscope, you should look for the following characteristics to identify a cell moving from metaphase to anaphase:
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Cell in Metaphase: The chromosomes will be lined up in the center of the cell, and you should see clearly defined structures of the chromosomes with the centromeres intact.
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Cell transitioning to Anaphase: You will start to see the chromosomes separating and moving toward the poles of the cell. The centromeres will be splitting apart, and the chromatids will be visibly getting pulled to opposite sides.
If you have actual images or descriptions of cells labeled W, X, Y, and Z, the cell that displays the characteristic of having chromosomes aligned at the center but starting to separate would be the one transitioning from metaphase to anaphase.
Please check the images carefully for these signs to identify which cell is moving from metaphase into anaphase. If you can describe what you see in each cell, I’d be happy to help you determine which one it is.