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BIOSCI101 Evolution - Lecture 3

Eilidh Young 6 preguntas

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Preguntas del test (6)

  1. 1Which of these is NOT true in regards to Neo-Darwinism?
    1. AAmple genetic variation arises and is contained in
      populations.
    2. BEvolution in populations is influenced by natural
      selection and is characterised by changes in gene
      frequencies.
    3. CAdaptive genetic variation produces small stepwise
      changes in phenotypes, which accumulate
      gradually over long periods of time.
    4. DThe divergence of geographical isolated
      populations is unimpeded and gradually leads to
      speciation.
    5. EThe gradual accumulation of genetic differences,
      via natural selection, results in new genera and
      families of organisms (macroevolution).
    6. FThis hypothesis predicts that over generations a freely
      mating population will give rise to a uniform population
      of individuals.
  2. 2What term are these definitions defining?

    [blank_start]Evolution[blank_end] – changes in allele frequencies in a
    population.
    [blank_start]Population[blank_end] – a group of individuals of the same
    species that live in the same area and interbreed.
    [blank_start]Gene pool[blank_end] – is the sum of all the alleles of all genes
    of all individuals in the population.
    1. AEvolution
    2. BPopulation
    3. CGene pool
  3. 3If only one allele exists at a particular locus or gene in
    a population, the allele is said to be fixed.
    1. AVerdadero
    2. BFalso
  4. 4If there are two or more alleles for a gene in a
    population, individuals will be either homozygous or
    heterozygous.
    1. AVerdadero
    2. BFalso
  5. 5Which of these are TRUE, with respect to the Hardy-Weinberg Equilibrium?
    1. APopulation genetics defines evolution as changes in
      allele frequencies.
    2. BIn a population that is not evolving, allele and
      genotype frequencies will remain constant from one
      generation to the next.
    3. CA non-changing population is said to be in Hardy-Weinberg
      equilibrium.
    4. DThe Hardy-Weinberg equation allows us to calculate
      the expected genotype frequencies given the
      observed allele frequencies.
  6. 6Match the condition for Hardy-Weinberg equilibrium with its definition.

    1. [blank_start]No mutations[blank_end]. The gene pool is modified if mutations change alleles.
    2. [blank_start]Mating occurs at random[blank_end]. If individuals mate with a subset of the population, genotype frequencies change.
    3. [blank_start]No natural selection[blank_end]. Differences in survival and reproduction of individuals with different genotypes can alter allele frequencies.
    4. [blank_start]Extremely large population size[blank_end]. The smaller the population, the more likely that allele frequencies will fluctuate by change.
    5. [blank_start]No gene flow[blank_end]. Movement of individuals (alleles) in and out of a population can alter allele frequencies.
    1. ANo mutations
    2. BMating occurs at random
    3. CNo natural selection
    4. DExtremely large population size
    5. ENo gene flow
    6. FNo genetic variation

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Descripción
Stage I The University of Auckland BIOSCI 101 Test sobre BIOSCI101 Evolution - Lecture 3, creado por Eilidh Young el 19/05/2017.
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