Eilidh Young
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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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Eilidh Young
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BIOSCI101 Evolution - Lecture 3

BIOSCI101 Evolution - Lecture 3

Pregunta 1 de 6

1

Which of these is NOT true in regards to Neo-Darwinism?

Selecciona una de las siguientes respuestas posibles:

  • Ample genetic variation arises and is contained in
    populations.

  • Evolution in populations is influenced by natural
    selection and is characterised by changes in gene
    frequencies.

  • Adaptive genetic variation produces small stepwise
    changes in phenotypes, which accumulate
    gradually over long periods of time.

  • The divergence of geographical isolated
    populations is unimpeded and gradually leads to
    speciation.

  • The gradual accumulation of genetic differences,
    via natural selection, results in new genera and
    families of organisms (macroevolution).

  • This hypothesis predicts that over generations a freely
    mating population will give rise to a uniform population
    of individuals.

Explicación

Pregunta 2 de 6

1

Rellena los espacios en blanco para completar el texto.

What term are these definitions defining?

– changes in allele frequencies in a
population.
– a group of individuals of the same
species that live in the same area and interbreed.
– is the sum of all the alleles of all genes
of all individuals in the population.

Explicación

Pregunta 3 de 6

1

If only one allele exists at a particular locus or gene in
a population, the allele is said to be fixed.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 4 de 6

1

If there are two or more alleles for a gene in a
population, individuals will be either homozygous or
heterozygous.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 5 de 6

1

Which of these are TRUE, with respect to the Hardy-Weinberg Equilibrium?

Selecciona una o más de las siguientes respuestas posibles:

  • Population genetics defines evolution as changes in
    allele frequencies.

  • In a population that is not evolving, allele and
    genotype frequencies will remain constant from one
    generation to the next.

  • A non-changing population is said to be in Hardy-Weinberg
    equilibrium.

  • The Hardy-Weinberg equation allows us to calculate
    the expected genotype frequencies given the
    observed allele frequencies.

Explicación

Pregunta 6 de 6

1

Match the condition for Hardy-Weinberg equilibrium with its definition.

1. . The gene pool is modified if mutations change alleles.
2. . If individuals mate with a subset of the population, genotype frequencies change.
3. . Differences in survival and reproduction of individuals with different genotypes can alter allele frequencies.
4. . The smaller the population, the more likely that allele frequencies will fluctuate by change.
5. . Movement of individuals (alleles) in and out of a population can alter allele frequencies.

Arrastra y suelta para completar el texto.

    No mutations
    Mating occurs at random
    No natural selection
    Extremely large population size
    No gene flow
    No genetic variation

Explicación

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