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------------------------------------------------ For the experiment shown in Figure 12.6, which answer best describes what the prediction would be if chromosome movement were based on microtubule shortening at the spindle pole?

A. The darkened section will move toward the spindle pole but the distance between chromosomes and the darkened section will remain constant.

B. The darkened section will disappear as soon as chromosomes begin to move.

C. The darkened section will remain stationary but the distance between chromosomes and the darkened section will decrease.

D. Daughter chromosomes will move toward the pole faster than the darkened section.

The spindle fibers, which are composed of microtubules and accessory filaments, are responsible for the separation of homologous chromosomes during meiosis I. The proper separation of the chromosomes will not occur if the spindle fibers fail to attach to the chromosomes (non-disjunction).

Spindle fibers are attached to the chromosome through which process?

During the prophase of mitosis, kinetochores, which are specialized regions on centromeres, attach chromosomes to spindle fibers. The centromere is a chromosome segment that connects sister chromatids. The kinetochore connects spindle fibers to the centromere during mitosis.

Which of the following is the best stage for studying the shape and size of chromosomes?

As a result of the preceding discussion, it is clear that metaphase is the best stage for studying chromosome morphology. As a result, Metaphase is the correct answer.

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