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25 Cards in this Set
- Front
- Back
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A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in |
G1 |
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Why do some species employ both mitosis and meiosis, whereas other species use only mitosis |
They need both if they are reproducing sexually |
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What are kinetochores |
They are sites at which microtubules attach to chromosomes |
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During _____ both the contents of the nucleus and the cytoplasm are divided |
The mitotic phase |
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During _____ the cell grows and replicates both its organelles and its chromosomes |
interphase |
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Nucleoli are present during |
interphase |
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Cytokinesis often, but not always, accompanies |
telophase |
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Chromosomes become visible during |
prophase |
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Centromeres divide and sister chromatids become full-fledged chromosomes during |
anaphase |
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Spindle fibers attach to kinetochores during |
prometaphase |
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What stage is this |
anaphase |
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What stage is this |
cytokinesis as it occurs in animal cells |
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What stage is this |
prophase |
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What stage is this |
metaphase |
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What stage is this |
prometaphase |
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What stage is this |
cytokinesis as it occurs in plant cells |
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What stage is this |
telophase |
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During prophase a homologous pair of chromosomes consists of |
two chromosomes and four chromatids |
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Why is it difficult to observe individual chromosomes with a light microscope during interphase |
They have uncoiled to form long, thin strands. |
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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 |
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In some organisms, such as certain fungi and algae, cells undergo the cell cycle repeatedly without subsequently undergoing cytokinesis. What would result from this |
large cells containing many nuclei |
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Cells will usually divide if they receive the proper signal at a checkpoint in which phase of the cell cycle |
G1 |
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True or False. Replication of DNA occurs in mitosis |
False |
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A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain |
92 |
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ytochalasin B is a chemical that disrupts microfilament formation. How would this interfere with cell division |
cleavage |
