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Questions and Answers
Mitosis is a type of cell division that results in four daughter cells that are genetically identical to the parent cell.
Mitosis is a type of cell division that results in four daughter cells that are genetically identical to the parent cell.
False
The purpose of mitosis is to allow for the reproduction of entire organisms.
The purpose of mitosis is to allow for the reproduction of entire organisms.
False
During prophase, chromatin condenses into visible chromosomes.
During prophase, chromatin condenses into visible chromosomes.
True
Metaphase is the stage where the nuclear envelope reforms around each set of chromosomes.
Metaphase is the stage where the nuclear envelope reforms around each set of chromosomes.
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Sister chromatids are identical copies of a chromosome that separate during anaphase.
Sister chromatids are identical copies of a chromosome that separate during anaphase.
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Mitosis is essential for the development, growth, and maintenance of tissues in unicellular organisms.
Mitosis is essential for the development, growth, and maintenance of tissues in unicellular organisms.
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Study Notes
Definition and Purpose
- Mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell.
- The purpose of mitosis is to allow for growth, repair, and replacement of cells in multicellular organisms.
Stages of Mitosis
- Interphase: The cell grows, replicates its DNA, and prepares for cell division.
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Prophase:
- Chromatin condenses into visible chromosomes.
- Nuclear envelope breaks down.
- Microtubules form spindle fibers.
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Metaphase:
- Chromosomes line up at the center of the cell.
- Each chromosome is attached to a spindle fiber.
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Anaphase:
- Sister chromatids separate and move to opposite poles.
- Spindle fibers contract, pulling the sister chromatids apart.
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Telophase:
- Nuclear envelope reforms around each set of chromosomes.
- Chromatin uncondenses.
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Cytokinesis:
- Cytoplasm divides, and the cell splits into two daughter cells.
Key Features
- Sister chromatids: Identical copies of a chromosome that separate during anaphase.
- Spindle fibers: Microtubules that attach to the centromere of each chromosome, guiding their movement during mitosis.
- Centromere: The region on a chromosome where spindle fibers attach.
Importance of Mitosis
- Allows for rapid cell growth and repair in multicellular organisms.
- Enables the replacement of damaged or old cells.
- Essential for development, growth, and maintenance of tissues.
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Description
Learn about the stages of mitosis, including interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. Understand the purpose and importance of mitosis in multicellular organisms.
