Skip to main content
Pearson+ LogoPearson+ Logo

Hardy Weinberg quiz #1 Flashcards

Back
Hardy Weinberg quiz #1
Control buttons has been changed to "navigation" mode.
1/17
  • What does the letter 'q' represent in the Hardy-Weinberg equation?
    In the Hardy-Weinberg equation, 'q' represents the frequency of the recessive allele in the population.
  • If a population has an allele frequency of q = 0.25, what is the frequency of the dominant allele (p)?
    Since p + q = 1, if q = 0.25, then p = 1 - 0.25 = 0.75.
  • Which of the following statements is NOT an assumption of the Hardy-Weinberg principle: no selection, no new alleles, no migration, finite population size, or random mating?
    Finite population size is NOT an assumption of the Hardy-Weinberg principle; the principle assumes an infinitely large population.
  • If the frequency of the g allele is 0.6, what percentage of the alleles in the population are g?
    If the g allele frequency is 0.6, then 60% of the alleles in the population are g.
  • What does the formula p^2 + 2pq + q^2 = 1 represent in Hardy Weinberg equilibrium?
    It represents the genotype frequencies in a population: p^2 for homozygous dominant, 2pq for heterozygotes, and q^2 for homozygous recessive individuals.
  • How can you determine the frequency of heterozygotes in a population using Hardy Weinberg?
    You use the term 2pq in the formula p^2 + 2pq + q^2 = 1, where p and q are the allele frequencies.
  • If a recessive disease occurs in 1 out of 1100 individuals, which Hardy Weinberg value does this frequency represent?
    This frequency represents q^2, the proportion of homozygous recessive individuals in the population.
  • What must you do to calculate the allele frequency q from the frequency of a recessive disease in a population?
    You take the square root of the disease frequency (q^2) to find q.
  • Why is Hardy Weinberg equilibrium considered a theoretical model rather than a reflection of real populations?
    Because its five assumptions (no selection, no mutation, no migration, infinite population size, and random mating) are rarely, if ever, met in actual populations.
  • What does the assumption of 'no migration' mean in the context of Hardy Weinberg equilibrium?
    It means that individuals do not enter or leave the population, so gene flow does not alter allele frequencies.
  • What is a gene pool in the context of population genetics?
    A gene pool is the sum of all alleles present in the breeding members of a population at a specific time.
  • How is allele frequency defined in population genetics?
    Allele frequency is the proportion of a specific allele among all alleles for a given gene in a population.
  • Under the ideal conditions assumed by the Hardy Weinberg principle, how do allele frequencies change over time?
    Under Hardy Weinberg's ideal conditions, allele frequencies do not change from one generation to the next.
  • What formula is used to calculate allele frequencies in a population according to the Hardy Weinberg principle?
    The formula p + q = 1 is used, where p is the frequency of one allele (often dominant) and q is the frequency of the other allele (often recessive).
  • How do you calculate the frequency of a specific allele in a population using Hardy Weinberg equilibrium?
    To calculate the frequency of an allele, count the number of times the allele appears in the population and divide by the total number of alleles for that gene. For two alleles, use p + q = 1.
  • What does the term 'allele frequency' describe in the context of a gene pool?
    Allele frequency describes how often a particular allele occurs in the gene pool of a population.
  • How do you calculate the expected frequency of the homozygous recessive genotype (cc) using Hardy Weinberg equilibrium?
    The expected frequency of the homozygous recessive genotype (cc) is calculated as q^2, where q is the frequency of the recessive allele.