Cell Cycle and Mitosis Overview
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Questions and Answers

During which phase of the cell cycle does karyokinesis occur?

  • Prophase (correct)
  • Interphase
  • Anaphase
  • G1

    • What is the main function of cytokinesis in cell division?

  • Synthesizing de novo organelles
  • Producing genetically unique daughter cells
  • Replicating organelles
  • Enclosing daughter cells in plasma membrane (correct)

    • Which phase of mitosis involves the separation of sister chromatids to opposite poles of the cell?

  • Prometaphase
  • Metaphase
  • Anaphase (correct)
  • Prophase

    • What occurs during the S phase of interphase?

    <p>DNA replication</p> Signup and view all the answers

    In which phase does the nucleus of a cell divide into two identical daughter nuclei?

    <p>Telophase</p> Signup and view all the answers

    What is the main outcome of uncontrolled mitosis in an organism?

    <p>Tumor formation</p> Signup and view all the answers

    What is the major difference between meiosis in males and females?

    <p>Oogenesis collects cytoplasm in one egg cell and reduces the other products to polar bodies.</p> Signup and view all the answers

    What happens during the Second Meiotic Division?

    <p>Each gamete receives only one chromatid from each original tetrad.</p> Signup and view all the answers

    How is cytokinesis different in mitosis and meiosis?

    <p>Cytokinesis in meiosis leads to four haploid gametes with equal cytoplasm.</p> Signup and view all the answers

    What is the role of polar bodies in oogenesis?

    <p>Polar bodies have no role in oogenesis.</p> Signup and view all the answers

    What characterizes interphase in terms of visible chromosomes?

    <p>Visible chromosomes are absent</p> Signup and view all the answers

    What happens to a primary spermatocyte during spermatogenesis?

    <p>It undergoes meiosis I to produce haploid secondary spermatocytes.</p> Signup and view all the answers

    During which phase of mitosis do centrioles migrate to opposite ends of the cell?

    <p>Prophase</p> Signup and view all the answers

    What is a zygote?

    <p>A cell formed when two gametes are joined by sexual reproduction.</p> Signup and view all the answers

    What contributes to the elongation of the cell during mitosis?

    <p>Inter-polar microtubules</p> Signup and view all the answers

    What is the function of Separase during mitosis?

    <p>Degradate cohesin</p> Signup and view all the answers

    How many chromosomes are present at each pole at the end of anaphase in human cells?

    <p>46 chromosomes</p> Signup and view all the answers

    What is the main event of telophase in mitosis?

    <p>Cytokinesis occurs</p> Signup and view all the answers

    What is the main difference between Metaphase I in meiosis and Metaphase in mitosis?

    <p>In Metaphase I, chromosomes consist of tetrads, while in mitosis, chromosomes consist of sister chromatids.</p> Signup and view all the answers

    What occurs during Anaphase II of meiosis that distinguishes it from Anaphase in mitosis?

    <p>In Anaphase II, centromeres divide and sister chromatids are separated, while in mitosis, centromeres do not divide.</p> Signup and view all the answers

    What distinguishes Telophase I from Telophase II in meiosis?

    <p>In Telophase I, nuclear membrane reappears before cytokinesis, while in Telophase II, cytokinesis occurs before the nuclear membrane reappears.</p> Signup and view all the answers

    Which characteristic is unique to Prophase II in meiosis when compared to Prophase in mitosis?

    <p>Prophase II is marked by the presence of tetrads attached by a common centromere, unlike Prophase in mitosis.</p> Signup and view all the answers

    What event specifically occurs in Metaphase II that does not happen in Metaphase in mitosis?

    <p>Centromeres divide and chromatids separate at the metaphase plate.</p> Signup and view all the answers

    What sets apart Karyokinesis during Anaphase I from Anaphase II?

    <p>Karyokinesis leads to the separation of sister chromatids in Anaphase I and homologous chromosomes separation in Anaphase II.</p> Signup and view all the answers

    What is the main difference in the number of divisions between mitosis and meiosis?

    <p>In mitosis, there is one division, while in meiosis, there are two divisions.</p> Signup and view all the answers

    Which stage of meiosis involves the formation of tetrads through synapsis of homologous chromosomes?

    <p>Prophase I</p> Signup and view all the answers

    What is a key difference between the chromosomes in mitosis and meiosis?

    <p>In mitosis, sister chromatids separate, while in meiosis, homologous chromosomes pair up.</p> Signup and view all the answers

    Which phase involves the separation of homologous chromosomes in meiosis?

    <p>Anaphase I</p> Signup and view all the answers

    What characterizes the starting point of meiosis?

    <p>A diploid cell duplicating its genetic material</p> Signup and view all the answers

    What is unique about prophase I in meiosis compared to mitotic prophase?

    <p>Homologous pairs actually pair up during prophase I.</p> Signup and view all the answers

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