Chapter 9

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Cytokinesis often, but not always, accompanies _____.

telophase

Which of the following is true of kinetochores?

They are sites at which microtubules attach to chromosomes.

Why is it difficult to observe individual chromosomes with a light microscope during interphase?

They have uncoiled to form long, thin strands.

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely

a plant cell in the process of cytokinesis.

Centromeres divide and sister chromatids become full-fledged chromosomes during _____.

anaphase

During _____ the cell grows and replicates both its organelles and its chromosomes.

interphase

Nucleoli are present during _____.

interphase

Spindle fibers attach to kinetochores during _____.

prometaphase

Chromosomes become visible during _____.

prophase

Which of the following does not occur during mitosis? - separation of the spindle poles - condensation of the chromosomes - separation of sister chromatids - replication of the DNA - spindle formation

replication of the DNA

During _____ both the contents of the nucleus and the cytoplasm are divided.

the mitotic phase


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