6. You view a cell under a microscope, where the chromosomes are all aligned at the center of the cell, and the sister chromatids are attached to each other. What will happen next? A. Cohesin will break down, allowing sister chromatids to separate. B. The chromosomes will decondense. C. The nuclear envelope will break down. D. Spindle fibers will attach to the kinetochores.
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Adi S.
A researcher examining a root tip observes a plant cell with condensed sister chromatids, kinetochores with attached microtubules, and individual chromosomes that are aligned at the equatorial plate of the cell. Which of the following best describes what the next process will be in the cell? answer choices a) Homologous chromosomes (each with two sister chromatids) will move toward opposite poles of the cell. b) Paired chromatids will separate, and the new daughter chromosomes will move toward opposite poles of the cell. c) The nuclear envelope will break down, and the spindle will begin to form. d) The chromatin will decondense, and the daughter cell will enter interphase.
Jennifer H.
Q6.9. The drug colchicine prevents the spindle's microtubules from forming or growing. What would happen in mitosis to a cell that was given colchicine throughout mitosis? The chromosomes would not condense. The nuclear envelope would not dissolve. The chromosomes would not line up for metaphase. The chromosomes would line up for metaphase but would not pull apart in anaphase. Q6.10. Would a cell that was missing the kinetochores on one of its chromosomes be able to get past the metaphase checkpoint? No, because the spindle could not attach to that chromosome and pull it to the midline. No, because cohesin on that chromosome could not dissolve. No, because kinetochores are necessary for sister chromatids to be held together. Yes, because kinetochores do not have any effect on the metaphase checkpoint.
Shaiju T.
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