interphase, Nucleoli are present during interphase.
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Cytokinesis often, but not always, accompanies _____.
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telophase, Cytokinesis often, but not always, accompanies telophase.
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Chromosomes become visible during _____.
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prophase, During prophase, the chromatin fibers become discrete chromosomes.
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Centromeres divide and sister chromatids become full-fledged chromosomes during _____.
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anaphase, During anaphase, sister chromatids separate and daughter chromosomes migrate to opposite poles.
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Spindle fibers attach to kinetochores during _____.
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prometaphase, Attachment of spindle fibers to kinetochores is one of the events of prometaphase.
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anaphase
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During anaphase centromeres come apart, and sister chromatids become full-fledged chromosomes, which migrate to opposite poles of the cell.
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cytokinesis as it occurs in animal cells
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Cytokinesis in animal cells involves the formation of a cleavage furrow.
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prophase
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Events of prophase include the condensation of chromatin and the dispersal of nucleoli.
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metaphase
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During metaphase chromosomes align along the metaphase plate.
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prometaphase
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The events of prometaphase include the attachment of spindle fibers to kinetochores.
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cytokinesis as it occurs in plant cells
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Cytokinesis in plant cells involves the formation of a cell plate.
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telophase
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During telophase both nuclear envelopes and nucleoli re-form.
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During prophase a homologous pair of chromosomes consists of _____.
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two chromosomes and four chromatids
At this point each of the chromosomes consists of two chromatids.
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During _____ both the contents of the nucleus and the cytoplasm are divided.
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the mitotic phase, The mitotic phase encompasses both mitosis and cytokinesis.
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During _____ the cell grows and replicates both its organelles and its chromosomes.
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interphase, These are the events of interphase.
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Cytokinesis in plant cells occurs through the formation of a:
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Cell Plate,
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During which stage of mitosis do the sister chromatids move away from each other?
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Anaphase
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If a cell contained 12 chromosomes, during Interphase, how many chromosomes would be present during Anaphase?
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24
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Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. One nucleus had 4 picograms of DNA. What phase of the cell cycle was this nucleus most likely in?
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S
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All of the following occur during mitotic prophase:
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The mitotic spindle is organized.
The centrioles move apart.
The nuclear envelope disappears.
The nucleolus disintegrates.
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Replicated chromosomes can be found during which of the following stages of the cell cycle?
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Metaphase
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asexual reproduction
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A single individual is reproducing.
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Human gametes are produced by _____.
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meiosis, Meiosis produces haploid gametes from a diploid parental cell.
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Normal human gametes carry _____ chromosomes.
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23, This is the number of chromosomes in a single set of human chromosomes.
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A diploid organism whose somatic (nonsex) cells each contain 32 chromosomes produces gametes containing _____ chromosomes.
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16, 16 is half of 32.
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Meiosis I produces _____ cells, each of which is _____.
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two ... haploid, At the end of meiosis I there are two haploid cells.
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Meiosis II typically produces _____ cells, each of which is _____.
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four ... haploid
At the end of meiosis II there are typically 4 haploid cells.
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prophase II
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The events of prophase II are essentially the same as those of mitotic prophase except that prophase II cells are haploid.
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anaphase II
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During anaphase II sister chromatids separate and migrate to opposite poles.
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telophase II and cytokinesis
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Four haploid cells are present at the end of telophase II and cytokinesis.
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During _____ sister chromatids separate.
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anaphase II
Anaphase II is essentially the same as mitotic anaphase except that the cell is haploid.
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telophase I and cytokinesis
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At the end of telophase I and cytokinesis there are two haploid cells.
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At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids.
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telophase I
At the end of telophase I and cytokinesis, there are two haploid cells with chromosomes that consist of two sister chromatids each.
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prophase I
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Homologous chromosomes pair during prophase I..
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metaphase II
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Metaphase II is essentially the same as mitotic metaphase except that the cells are haploid.
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metaphase I
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During metaphase I tetrads align along the metaphase plate.
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prophase I
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Synapsis, the pairing of homologous chromosomes, occurs during prophase I.
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Homologous chromosomes migrate to opposite poles during _____.
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anaphase I
During anaphase I sister chromatids remain attached at their centromeres, and homologous chromosomes move to opposite poles.
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During _____ chromosomes align single file along the equator of a haploid cell.
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metaphase II
Metaphase II is essentially the same as mitotic metaphase except that the cell is haploid.
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anaphase I
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During anaphase I homologous chromosomes, consisting of sister chromatids, migrate to opposite poles.
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telophase II
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At the end of telophase II and cytokinesis there are four haploid cells.
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During _____ a spindle forms in a haploid cell.
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prophase II
Prophase II is essentially the same as mitotic prophase except that the cells are haploid.
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interphase
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During interphase the centrosome duplicates and the chromosomes are not condensed.
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