Mendelian Genetics and Population Genetics Quiz
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Questions and Answers

What is the frequency of the CYCY genotype in the dragonfly population?

  • 0.20
  • 0.02
  • 0.12 (correct)
  • 0.06

    • How can you determine if a pea plant with purple flowers is homozygous dominant or heterozygous?

  • By measuring the height of the plant.
  • By performing a test cross with a known homozygous recessive plant. (correct)
  • By analyzing the flower color of the plant's leaves.
  • By crossing it with another purple flower plant.

    • What is the frequency of the CR allele in the dragonfly population?

  • 0.6
  • 0.4
  • 0.8 (correct)
  • 0.2

    • In the Sanger sequencing method, where are the smallest DNA fragments found on the gel?

    <p>At the bottom of the gel</p> Signup and view all the answers

    If a test cross results in some offspring with white flowers, what can be concluded about the purple flower plant?

    <p>It is heterozygous.</p> Signup and view all the answers

    What is the total population size of the dragonflies based on the provided genotype counts?

    <p>1020</p> Signup and view all the answers

    What is the role of ddNTPs in the Sanger method of DNA sequencing?

    <p>They cause the termination of chain elongation.</p> Signup and view all the answers

    Given the frequency of the dominant allele p = 0.79 in yellow squash, what would be the expected frequency of homozygous dominant individuals in the population?

    <p>0.62</p> Signup and view all the answers

    If an animal has the genotype HhTt, how many different types of gametes can it produce?

    <p>4</p> Signup and view all the answers

    In the context of Mendelian genetics, what does codominance refer to?

    <p>Both alleles contribute equally to the phenotype.</p> Signup and view all the answers

    What is the consequence of crossing a heterozygous tall plant (Tt) with a homozygous tall plant (TT) regarding the offspring's phenotypes?

    <p>All offspring will be tall.</p> Signup and view all the answers

    What is necessary for natural selection to operate within a population?

    <p>Genetic variation must be present</p> Signup and view all the answers

    Which event is characterized by the random fluctuation of allele frequencies due to chance?

    <p>Genetic drift</p> Signup and view all the answers

    If 64% of a population can taste PTC, what percentage of heterozygous individuals is expected in a population at Hardy-Weinberg equilibrium?

    <p>48%</p> Signup and view all the answers

    Which type of selection favors individuals with intermediate phenotypes in a population?

    <p>Stabilizing selection</p> Signup and view all the answers

    The initial genetic diversity of a population on Hawaii is most likely to have been influenced by which phenomenon?

    <p>The founder effect</p> Signup and view all the answers

    What do fossil records indicate about the history of life on Earth?

    <p>Fossils indicate a rapid succession of species changes.</p> Signup and view all the answers

    What is the best definition of artificial selection?

    <p>Humans selecting traits in organisms through breeding.</p> Signup and view all the answers

    Which of the following outcomes represents a typical effect of evolution on a population?

    <p>Increased genetic variability with environmental adaptation.</p> Signup and view all the answers

    What is the ratio of phenotypes observed in Mendel's F2 generation during dihybrid crosses?

    <p>9:3:3:1</p> Signup and view all the answers

    Which of the following describes complete dominance?

    <p>One phenotype completely masks another.</p> Signup and view all the answers

    Which statement about the Law of Independent Assortment is correct?

    <p>Genes located far apart on the same chromosome do not assort independently.</p> Signup and view all the answers

    What is the phenotype of a heterozygous snapdragon flower exhibiting codominance?

    <p>Red and white petals</p> Signup and view all the answers

    Which of the following is an example of incomplete dominance?

    <p>A red flower mixed with a white flower producing pink flowers.</p> Signup and view all the answers

    What ensures a population's survival through genetic variance?

    <p>Presence of different alleles and phenotypes.</p> Signup and view all the answers

    Which of the following statements about the Law of Segregation is true?

    <p>It states that alleles separate during gamete formation.</p> Signup and view all the answers

    What is the only mechanism of evolution that consistently leads to adaptive change in a population?

    <p>Natural selection</p> Signup and view all the answers

    Which factor primarily results in an allele becoming fixed in a population?

    <p>Genetic drift due to random events</p> Signup and view all the answers

    What does it mean for an allele to be fixed in a population?

    <p>It has completely replaced all other alleles at that locus.</p> Signup and view all the answers

    What is the frequency of the CR allele in the population?

    <p>0.76</p> Signup and view all the answers

    How many individuals in the population are homozygous recessive (CWCW)?

    <p>134</p> Signup and view all the answers

    Which of the following best describes a population that is in Hardy-Weinberg equilibrium?

    <p>Its allele frequencies are static over generations.</p> Signup and view all the answers

    What is the total number of alleles in the population?

    <p>1510</p> Signup and view all the answers

    What term describes the complete set of alleles within a population?

    <p>Gene pool</p> Signup and view all the answers

    Which example illustrates the process of genetic drift?

    <p>A drought causes a proportion of a population to die.</p> Signup and view all the answers

    Which of the following equations relates allele frequency to genotype frequency?

    <p>p^2 + 2pq + q^2 = 1</p> Signup and view all the answers

    If p is known to be 0.34, what is the value of q?

    <p>0.66</p> Signup and view all the answers

    How does gene flow differ from genetic drift?

    <p>Gene flow involves the addition of alleles from outside populations.</p> Signup and view all the answers

    What would be the genotype frequency of the heterozygous genotype if p is 0.34 and q is 0.66?

    <p>2pq = 0.4488</p> Signup and view all the answers

    Which of the following scenarios is an example of natural selection?

    <p>A specific type of flower attracts more pollinators than another.</p> Signup and view all the answers

    How many total alleles represent the CW allele in the population?

    <p>366</p> Signup and view all the answers

    Which statement accurately describes adaptive changes in a population?

    <p>Adaptive changes lead to improvements in fitness over generations.</p> Signup and view all the answers

    What is the phenotype associated with the genotype CRCR?

    <p>Blue</p> Signup and view all the answers

    If the total population is 755, how many individuals are represented by the genotype CRCW?

    <p>232</p> Signup and view all the answers

    What is the combined genotype frequency that yields a total frequency of one?

    <p>1.00</p> Signup and view all the answers

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