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15 Cards in this Set

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prophase
The first subphase of mitosis, in which the chromatin is condensing and the mitotic spindle begins to form, but the nucleolus and nucleus are still intact.
prometaphase
The second subphase of mitosis, in which discrete chromosomes consisting of identical sister chromatids appear, the nuclear envelope fragments, and the spindle microtubules attach to the kinetochores of the chromosomes.
G1 phase
The first growth phase of the cell cycle, consisting of the portion of interphase before DNA synthesis begins.
G2 phase
The second growth phase of the cell cycle, consisting of the portion of interphase after DNA synthesis occurs.
anaphase
The fourth subphase of mitosis, in which the chromatids of each chromosome have separated and the daughter chromosomes are moving to the poles of the cell.
metaphase
The third subphase of mitosis, in which the spindle is complete and the chromosomes, attached to microtubules at their kinetochores, are all aligned at the metaphase plate.
telophase
The fifth and final subphase of mitosis, in which daughter nuclei are forming and cytokinesis has typically begun.
interphase
The period in the cell cycle when the cell is not dividing. During interphase, cellular metabolic activity is high, chromosomes and organelles are duplicated, and cell size may increase. Interphase accounts for 90% of the cell cycle.
S phase
The synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated.
M phase
The mitotic phase of the cell cycle, which includes mitosis and cytokinesis.
kinetochore
A specialized region on the centromere that links each sister chromatid to the mitotic spindle.
centromere
The centralized region joining two sister chromatids.
origins of replication
Sites where the replication of a DNA molecule begins.
G0 phase
A nondividing state in which a cell has left the cell cycle
cell cycle control system
A cyclically operating set of molecules in the cell that triggers and coordinates key events in the cell cycle.