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Cell Division Review Questions for AP Biology

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By — McGraw-Hill Professional
Updated on Oct 24, 2011

Review the following concepts if needed:

Review Questions

  1. Which of the following plant types has the gametophyte as its prominent generation?
    1. Angiosperms
    2. Bryophytes
    3. Conifers
    4. Gymnosperms
    5. Ferns
  2. During which phase of the cell cycle does crossing over occur?
    1. Metaphase of mitosis
    2. Metaphase I of meiosis
    3. Prophase I of meiosis
    4. Prophase of mitosis
    5. Anaphase I of meiosis
  3. For questions 3–6, please use the following answer choices:

    1. Prophase
    2. Metaphase
    3. Anaphase
    4. Telophase
    5. Cytokinesis
  4. During this phase, the split sister chromatids, now considered to be chromosomes, are moved to the opposite poles of the cell.
  5. During this phase the nucleus deteriorates, and the mitotic spindle begins to form.
  6. During this phase, the two daughter cells are actually split apart.
  7. During this phase, the sister chromatids line up along the equator of the cell, preparing to split.
  8. Which of the following organisms is diploid (2n) only as a zygote and is haploid for every other part of its life cycle?
    1. Humans
    2. Bryophytes
    3. Fungi
    4. Bacteria
    5. Angiosperms
  9. Which of the following statements is true about a human meiotic cell after it has completed meiosis I?
    1. It is diploid (2n).
    2. It is haploid (n).
    3. It has divided into four daughter cells.
    4. It proceeds directly to meiosis II without an intervening intermission.
  10. Which of the following is not true about cyclindependent kinase (CDK)?
    1. It is present only during the M phase of the cell cycle.
    2. When enough of it is combined with cyclin, the MPF (mitosis promoting factor) formed initiates mitosis.
    3. It is a protein that controls other proteins using phosphate groups.
    4. It is present at all times during the cell cycle.
  11. Which of the following statements about meiosis and/or mitosis is incorrect?
    1. Mitosis results in two diploid daughter cells.
    2. Meiosis in humans occurs only in gonad cells.
    3. Homologous chromosomes line up along the metaphase plate during mitosis.
    4. Crossover occurs during prophase I of meiosis.
    5. Meiosis consists of one replication phase followed by two division phases.

Answers and Explanations

  1. B—Bryophytes, or mosses, are the plant type that has the gametophyte (haploid) as its dominant generation. The others in this question have the sporophyte (diploid) as their dominant generation.
  2. C—Crossover occurs in humans only in prophase I. Propase I is a major source of variation in the production of offspring.
  3. C.
  4. A.
  5. E.
  6. B.
  7. C—The life cycle for fungi is different from that of humans. Fungi exist as haploid organisms and the only time they exist in diploid form is as a zygote. Like humans, the gametes for fungi are haploid (n) and combine to form a diploid zygote. Unlike in humans, the fungus zygote divides by meiosis to form a haploid organism.
  8. B—Human cells start with 46 chromosomes arranged in 23 pairs of homologous chromosomes. At this time they are 2n because they have two copies of each chromosome. After the S phase of the cell cycle, the DNA has been doubled in preparation for cell division. The first stage of meiosis pulls apart the homologous pairs of chromosomes. This means that after meiosis I, the cells are n, or haploid—they no longer consist of two full sets of chromosomes.
  9. A—CDK is present at all times during the cell cycle. It combines with a protein called cyclin, which accumulates during interphase of the cell cycle, to form MPF. When enough MPF is formed, the cell is pushed to begin mitosis. As mitosis continues, cyclin is degraded, and when the concentration of MPF drops below a level sufficient to maintain mitotic division, mitosis grinds to a halt until the threshold is reached again next time around the cycle.
  10. C—Answer choices A, B, D, and E are all correct. C is incorrect because homologous pairs of chromosomes pair together only during meiosis. During mitosis, the sister chromatid pairs align along the metaphase plate, separate from the homologous counterpart.
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