Questions and Answers
Nucleoli are present during _____
interphase
Cytokinesis often, but not always, accompanies _____
telophase
Chromosomes become visible during _____
prophase
Centromeres divide and sister chromatids become full-fledged chromosomes during _____
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Spindle fibers attach to kinetochores during _____
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During prophase a homologous pair of chromosomes consists of _____
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Why is it difficult to observe individual chromosomes with a light microscope during interphase?
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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?
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Which of the following is true of benign tumors but not malignant tumors?
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Which of these phases encompasses all of the stages of mitosis but no other events?
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During _____ both the contents of the nucleus and the cytoplasm are divided.
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During _____ the cell grows and replicates both its organelles and its chromosomes.
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A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain?
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Study Notes
Nucleoli and Interphase
- Nucleoli are observed during interphase, a phase where the cell is not actively dividing.
Cytokinesis and Telophase
- Cytokinesis typically follows telophase, marking the end of cell division processes.
Visibility of Chromosomes
- Chromosomes become visible at prophase, the first stage of mitosis.
Separation of Sister Chromatids
- In anaphase, centromeres divide, leading sister chromatids to become distinct chromosomes.
Spindle Fiber Attachment
- Prometaphase is characterized by the attachment of spindle fibers to kinetochores on chromosomes.
Homologous Chromosomes During Prophase
- A homologous chromosome pair during prophase consists of two chromosomes and four chromatids.
Observation of Chromosomes in Interphase
- Individual chromosomes are difficult to observe in interphase due to their uncoiled, elongated form.
Cells with Multiple Nuclei
- Certain fungi and algae can replicate their cell cycles without cytokinesis, resulting in large cells with multiple nuclei.
Benign vs. Malignant Tumors
- Benign tumors are localized and remain confined to their original site, unlike malignant tumors that spread.
Phases of Mitosis
- Mitosis includes all stages of cell division excluding other cellular events, encapsulated simply as Mitosis.
Division of Nucleus and Cytoplasm
- The mitotic phase involves the division of both nuclear contents and cytoplasm, ensuring two separate daughter cells.
Cell Growth and Replication in Interphase
- Interphase is primarily a growth phase where cells replicate organelles and duplicate chromosomes in preparation for division.
Chromatids Count in Human Cells
- A human bone marrow cell in prophase of mitosis contains 46 chromosomes, equating to 92 chromatids in total.
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Description
Test your knowledge of essential biology concepts with these flashcards focused on Chapter 9. Learn about key processes in cell division such as interphase, prophase, and cytokinesis. Perfect for students preparing for exams or anyone looking to reinforce their understanding of biology.
