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Chapter 20 Genes With Populations

40 Questions  I  By Josceline
Chapter 20 Genes With Populations

  
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1.  Natural selection as a mechanism of evolution that acts on variants within populations and ultimately  leads to the evolution of different species was proposed by
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2.  Features that increase the likelihood of survival and reproduction by an organism in a particular  environment are called
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3.  The gene pool includes
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4.  The founder principle explains how rare alleles may become more common in new
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5.  A restriction in genetic variability caused by a drastic reduction in population size is called a
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6.  The genetic contribution of an individual to succeeding generations, compared with that of other  individuals in the population, is known as
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7.  Darwin proposed that natural selection occurs in an environment by
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8.  The Hardy-Weinberg equations only hold true, that is, a population is only in equilibrium
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9.  In the Hardy-Weinberg equations, the frequencies of 2 alleles in a population (where there are only 2  alleles to consider) can be designated as
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10.  "The inheritance of acquired characteristics" proposal was put forward by
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11.  The frequency of a particular allele within a population can be changed, over time, by
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12.  The genetic preservation of the features that increase the likelihood of survival and reproduction of  some individuals within a population is called the process of
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13.  A locus with more variation than can be explained by mutation is referred to as
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14.  Hardy-Weinberg pointed out that the original proportions of the genotypes in a population would  remain constant from generation to generation if certain assumptions are met. Which one of the  following is not a Hardy-Weinberg condition?
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15.  For a gene with two alternative alleles, a (frequency p) and a (frequency q), the term in the algebraic  form of the Hardy-Weinberg equilibrium for the heterozygote genotype frequency is
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16.  Which one of the following is not an agent of natural evolutionary change?
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17.  The phenomenon in which rare alleles become more common in new populations is called
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18.  In small populations, frequencies of certain alleles may change by chance alone. Such random  change in the frequency of alleles is called
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19.  The type of non-random mating that causes the frequencies of particular genotypes to differ greatly  from those predicted by the Hardy-Weinberg equilibrium is called
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20.  Sometimes a restriction in genetic variability is imposed on populations by natural catastrophes such  as flooding, earthquake, etc. The surviving individuals reflect only a small, random genetic sample  of the population affected. This process is termed
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21.  Gene flow, defined as the movement of genes from one population to another, can take place by  migration, as well as
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22.  In some populations the drive is to mate with individuals that are phenotypically different at a variety  of loci. This leads to large numbers of heterozygotes and is called
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23.  Which one of the following is not an agent of evolutionary change?
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24.  About 80% of the alleles present in thoroughbred horses can be dated back to 31 known ancestors  from the late eighteenth century. As a result, one would expect
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25.  When selection acts to eliminate one extreme from an array of phenotypes it is called
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26.  The total of all the alleles of all the genes in a population can be thought of as
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27.  Certain small towns in the western United States have remained isolated and inbred since their  settlement many years ago. Some alleles are more common in these communities as compared to the  rest of the population. This effect is known as
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28.  Cheetahs have been through a genetic bottleneck; evidence for this is that
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29.  Compared with Hardy-Weinberg predictions, populations that have practiced assortative mating  have  
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30.  The Hardy-Weinberg equilibrium conditions for populations of organisms result in
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31.  In negative frequency-dependent selection, such as in the study done on the water boatman insect,  the incidence of predation leads to an
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32.  In some instances environmental change causes a situation where one phenotype is favored for a  period of time, and then a different phenotype is favored. This oscillating selection causes
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33.  . The text discusses sickle-cell anemia, which is a classic example of
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34.  In disruptive selection, over time
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35.  . In directional selection, over time
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36.  Which of the following would be expected to produce the smallest evolutionary change in a given  period of time in a population of birds?
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37.  Which one of the following could not be involved in gene flow?
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38.  Assortive and disassortive mating are similar in that both
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39.  The California populations of the Northern elephant seal are descendants from a very small  population of seals that was over-hunted in the 1890s. Heterozygosity in this population would be  expected to be ________ due to ________________.
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40.  Which of the following statements about the laboratory and field studies on evolution of protective  coloration in the guppy (as described in the textbook) is false?
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