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Mitosis - AP Biology Flashcards

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5725065733G1 PhaseFirst stage of interphase in which cell grows and performs its normal functions. Cell is diploid.0
5725065734G0 PhaseCell is performing its normal functions, but has left the cell cycle and is not dividing.1
5725065735S PhaseThe synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated.2
5725065736G2 PhaseLast stage of interphase in which cell grows and performs its normal functions. Cell is tetraploid.3
5725065737InterphaseCell grows, performs its normal functions, and prepares for division; consists of G1, S, and G2 phases4
5725065738ProphasePhase of mitosis in which chromosomes condense, nuclear membrane disappears, nucleolus disappears, and spindle fibers begin to form.5
5725065739MetaphasePhase of mitosis in which spindle fibers help chromosomes line up on the midline of the cell.6
5725065740AnaphasePhase of mitosis in which the chromosomes separate and move to opposite ends of the cell.7
5725065741TelophasePhase of mitosis during which chromosomes uncoil, a nuclear envelope returns around the chromatin, and a nucleolus becomes visible in each daughter cell"8
5725065742CytokinesisAt the end of telophase, actin fibers form an equator around the cell and contract, separating the cytoplasm into two daughter cells.9
5725065743CentrioleA paired cluster of microtubules near the nucleus in animal cells. This organelle organizes spindle fibers during mitosis.10
5725065744CentromereRegion of a chromosome where the two sister chromatids attach to one another. Contains the kinetochore.11
5725065745KinetochoreA specialized region on the centromere that links each sister chromatid to the mitotic spindle.12
5725065746Spindle FibersMade of microtubules that connect centrioles to kinetochores of chromosomes and that separate sister (mitosis) or homologous (meiosis) chromosomes during cell division13
5725065747ChromosomeA threadlike, gene-carrying structure found in the nucleus. Each chromosome consists of one very long DNA molecule and associated proteins.14
5725065748ChromatidOne of two identical "sister" parts of a duplicated chromosome.15
5725065749HaploidA cell with only one copy of each chromosome.16
5725065750DiploidA cell with two copies of each chromosome.17
5725065753Cyclin-Dependent Kinase (CDK)A group of protein kinases that are activated by the formation of a complex with a cyclin and are involved in the regulation of the cell cycle. Only active when bound to a cyclin.18
5725065754CyclinA cellular protein that occurs in a cyclically fluctuating concentration and that plays an important role in regulating the cell cycle.19
5725065758Proto-oncogeneA normal cellular gene corresponding to an oncogene; a gene with a potential to cause cancer but that requires some alteration to become an oncogene.20

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