chap 8 – Flashcard Test Questions
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1) A(n) ________ is an example of an organism that can sometimes reproduce asexually by parthenogenesis.
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C) Komodo dragon
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2) Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following functions EXCEPT ________.
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C) production of sperm and eggs
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3) The chromosomes of eukaryotic cells are found in the ________.
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A) nucleus
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4) Chromatin consists of ________.
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A) DNA and protein
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5) A duplicated chromosome consists of two ________.
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D) sister chromatids
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6) Sister chromatids are joined at the ________.
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A) centromere
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7) Which of the following occurs during interphase?
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B) Chromosome duplication occurs.
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8) The mitotic cell cycle results in the production of ________.
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C) two cells, each with the same amount of genetic material and the same genetic information
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9) Which of the following occurs during prophase?
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D) The mitotic spindle begins to form.
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10) Which of the following is a stage of mitosis?
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B) telophase
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11) The CORRECT sequence of stages of mitosis is ________.
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A) prophase, metaphase, anaphase, telophase
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12) During metaphase, ________.
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D) chromosomes line up in the middle of the cell
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13) Which of these events occurs during anaphase?
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A) Sister chromatids become separate chromosomes.
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14) During telophase, ________.
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A) the events of prophase are reversed
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15) A cell that completed the cell cycle without undergoing cytokinesis would ________.
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D) have two nuclei
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16) Cytokinesis typically begins during the ________ stage of mitosis.
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A) telophase
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17) What is the difference between a benign and a malignant tumor?
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C) Benign tumors do not metastasize; malignant tumors do.
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18) Which of the following will help prevent cancer and increase survival?
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C) Seek early detection of tumors.
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19) Homologous chromosomes ________.
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A) carry genes controlling the same inherited characteristics
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20) What chromosomes belong to a normal human male?
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C) 44 autosomes, one X chromosome, and one Y chromosome
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21) What chromosomes belong to a normal human female?
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B) 44 autosomes and 2 X chromosomes
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22) Chromosomes that do NOT determine the sex of an individual are called ________.
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D) autosomes
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23) Sexual reproduction in humans ________.
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A) allows a haploid sperm cell to fertilize a haploid egg cell
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24) In meiosis, how does prophase I differ from prophase II?
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A) During prophase I there is one diploid cell; during prophase II there are two haploid cells.
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25) How much genetic material is present in a cell during prophase I compared to a cell that has completed meiosis II?
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B) four times as much
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26) During metaphase I, ________.
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B) homologous chromosomes line up in the middle of the cell
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27) Upon completion of telophase I and cytokinesis, there is(are) ________ cell(s).
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C) two haploid
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28) Which of the following is a characteristic seen in prophase I that does NOT occur in prophase II?
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D) Crossing over occurs.
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29) Anaphase II is essentially the same as mitotic anaphase except that in anaphase II ________ and in mitotic anaphase ________.
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D) the cells are haploid and sister chromatids separate... the cells have the same number of chromosomes as the original cell and sister chromatids separate
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30) One difference between mitosis and meiosis is ________.
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A) mitosis produces cells genetically identical to the parent cell, but meiosis does not
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31) Genetic variation is accomplished by all but one of the following. Choose the exception.
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D) the events of meiosis II
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32) Which of the following is the best description of the events of anaphase I?
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C) Homologous chromosomes randomly separate and migrate to opposite poles.
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33) For a species with four pairs of chromosomes, ________ chromosome combinations are possible.
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C) 16
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34) Crossing over during prophase I results in ________.
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D) genetic recombination
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35) A karyotype (a chromosome display) would be unable to determine ________.
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D) eye color
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36) How many chromosomes can a gamete possess as a result of nondisjunction?
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A) n + 1 or n - 1
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37) How many chromosomes does an individual with Turner syndrome have?
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C) 2n − 1
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38) Sexual reproduction appears to be absent in bdelloid rotifers. Which of these, if found in this group, would bring into question the idea that they reproduce ONLY asexually?
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C) cells in which meiosis occurs
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39) Which of these describes the type of reproduction that is most adaptive in a rapidly changing environment with many different parasitic diseases present?
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C) sexual reproduction because the diversity of genotypes increases the likelihood that there is one which can survive in a new environment
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The second meiotic division is essentially a mitotic division except for the fact that the cells produced are
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haploid
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A person with Klinefelter syndrome has long arms, long legs and some breast development due to which chromosomal anomaly?
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XXY
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A geneticist is studying the failure of chromosomes to separate properly during meiosis. Which of the following would he be studying
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nondisjunction
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Which chromosome configuration designates a person with Turner syndrome?
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XO
