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Phases of Mitosis definitions Flashcards

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Phases of Mitosis definitions
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  • Mitosis


    The asexual process where a diploid somatic cell divides its nucleus and genetic material to produce two genetically identical diploid daughter cells.

  • Somatic Cell


    A non-reproductive cell in a multicellular organism, containing a diploid set of chromosomes, and undergoing mitosis for growth and repair.

  • Diploid Cell


    A cell containing two complete sets of chromosomes, one from each parent, typically found in somatic cells and resulting from mitosis.

  • Prophase


    The phase where chromatin condenses into visible chromosomes, the mitotic spindle begins to form, and the nucleolus disappears.

  • Prometaphase


    The nuclear envelope breaks down, allowing spindle fibers to attach to chromosomes, facilitating their movement.

  • Metaphase


    The phase of mitosis where chromosomes align at the cell's equator, ensuring they are evenly distributed before being separated into daughter cells.

  • Anaphase


    The phase of mitosis where sister chromatids are pulled apart to opposite poles of the cell by shortening spindle fibers.

  • Telophase


    The final phase of mitosis where two new nuclei form, chromosomes decondense, and the nuclear envelope reassembles, preparing the cell for cytokinesis.

  • Mitotic Spindle


    A structure composed of microtubules that segregates chromosomes into daughter cells during mitosis by attaching to chromosomes and pulling them apart.

  • Kinetochore Microtubules


    Microtubules that attach to chromosomes at the centromere, facilitating their movement and segregation to opposite poles during mitosis.

  • Nonkinetochore Microtubules


    Microtubules that elongate to push cell poles apart during mitosis, aiding in cell division without attaching to chromosomes.

  • Metaphase Plate


    The cell's equatorial plane where chromosomes align during metaphase, ensuring equal separation into daughter cells during anaphase.

  • Sister Chromatids


    Identical copies of a chromosome connected by a centromere, formed during DNA replication, and separated during cell division to ensure each daughter cell receives an exact copy.

  • Equator


    The imaginary line where chromosomes align during metaphase, ensuring equal separation into daughter cells.

  • Actin Filaments


    Thin, flexible protein strands crucial for cell movement, shape, and division, forming part of the cytoskeleton and interacting with myosin for muscle contraction and other cellular processes.