Mitosis And Meiosis - ChAPters 12-13 - AP Biology

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 mitosis and meiosis - chAPters 12-13 - AP biology

  
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1.  The centromere is a region in which
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2.  What is a chromatid?
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3.  What is the name for the special region on a duplicated chromosome that holds the sister chromatids together?
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4.  Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
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5.  If there are 20 chromatids in a cell, how many centromeres are there?
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6.  Which of the following statements is not true?
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7.  The lettered circle in the figure above shows a diploid nucleus with four chromosomes. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is symbolized as black and the other haploid set is gray. The chromosomes in the unlettered circle have not yet replicated. Choose the correct chromosomal conditions for the following stage. *At prometaphase of mitosis
8.  The lettered circle in the figure above shows a diploid nucleus with four chromosomes. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is symbolized as black and the other haploid set is gray. The chromosomes in the unlettered circle have not yet replicated. Choose the correct chromosomal conditions for the following stage. one daughter nucleus at telophase of mitosis
9.                  A.     telophase                 B.     anaphase                 C.     prometaphase                 D.     metaphase                 E.     prophase Choose the answer from the above that best fits the description: Two centrosomes are arranged at opposite poles of the cell.
10.                  A.     telophase                 B.     anaphase                 C.     prometaphase                 D.     metaphase                 E.     prophase   Choose the answer from above that best fits this description: Centrioles begin to move apart in animal cells.
11.                  A.     telophase                 B.     anaphase                 C.     prometaphase                 D.     metaphase                 E.     prophase   Choose the answer from above that best fits this description: This is the longest of the mitotic stages. D
12.                  A.     telophase                 B.     anaphase                 C.     prometaphase                 D.     metaphase                 E.     prophase   Choose the answer from above that best fits this description: Centromeres uncouple, sister chromatids are separated, and the two new chromosomes move to opposite poles of the cell.
13.  If cells in the process of dividing are subjected to colchicine, a drug that interferes with the functioning of the spindle apparatus, at which stage will mitosis be arrested?
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14.  A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei containing how many chromosomes?
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15.  If the cell whose nuclear material is shown above continues toward completion of mitosis, which of the following events would occur next?
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16.  All of the following occur during prophase of mitosis in animal cells except
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17.  If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?
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18.  If there are 20 chromatids in a cell at metaphase, how many chromosomes are there in each daughter cell following cytokinesis?
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19.  Where do the microtubules of the spindle originate during mitosis in both plant and animal cells?
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20.  All of the following occur during mitosis except the
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21.  If a cell has 8 chromosomes at metaphase of mitosis, how many chromosomes will it have during anaphase?
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22.  Cytokinesis usually, but not always, follows mitosis. If a cell completed mitosis but not cytokinesis, the result would be a cell with
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23.  Regarding mitosis and cytokinesis, one difference between higher plants and animals is that in plants
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24.  How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in G1 of the cell cycle?
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25.  The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this?
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26.  Taxol is an anticancer drug extracted from the Pacific yew tree. In animal cells, taxol disrupts microtubule formation by binding to microtubules and accelerating their assembly from the protein precursor, tubulin. Surprisingly, this stops mitosis. Specifically, taxol must affect
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27.  Which of the following are primarily responsible for cytokinesis in plant cells?
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28.  Which of the following organisms does not reproduce cells by mitosis and cytokinesis?
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29.  Chromosomes first become visible during ________ of mitosis.
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30.  The correct sequence of steps in the M phase of the cell cycle is
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31.  During which phases of mitosis are chromosomes composed of two chromatids?
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32.  Which of the following is false regarding the bacterial chromosome?
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33.  In which group of eukaryotic organisms does the nuclear envelope remain intact during mitosis?
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34.  Movement of the chromosomes during anaphase would be most affected by a drug that
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35.  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. In which stage of the cell cycle was the nucleus with 6 picograms of DNA?
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36.  A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus. Those cells would have ________ picograms at the end of the S phase and ________ picograms at the end of G2.
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37.  The somatic cells derived from a single-celled zygote divide by which process?
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38.  Cytoskeletal elements play important roles in cell division.  The mitotic spindle apparatus is made of ________ and pulls sister chromatids apart, whereas the contractile ring is made of ________ and required for the separation of daughter cells at the end of the mitotic phase of the cell cycle.
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39.  Imagine looking through a microscope at a squashed onion root tip. The chromosomes of many of the cells are plainly visible. In some cells, replicated chromosomes are aligned along the center (equator) of the cell. These particular cells are in which stage of mitosis?
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40.  If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will
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