Corn Yield Genetics Quiz
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Questions and Answers

What is the total yield in kg/du for the genotype Aabb?

  • 17 (correct)
  • 19
  • 13
  • 15
  • If a corn plant has the genotype AaBb, what is the yield contributed by allele 'A' alone?

  • 3 kg/du
  • 2 kg/du
  • 4 kg/du (correct)
  • 6 kg/du
  • Which of the following genotypes would yield 19 kg/du?

  • aaBB
  • aaBb
  • AAbb (correct)
  • AABb
  • If gene B contributes 6 kg/du in the AABB genotype, how much does gene b contribute in the same genotype?

    <p>2 kg/du</p> Signup and view all the answers

    What is the total yield in kg/du for the genotype AABb?

    <p>16</p> Signup and view all the answers

    What genetic phenomenon can mask the contribution of recessive alleles at a locus?

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

    In the context of genetic variance, what is the term for an allele that masks the expression of another allele?

    <p>Dominant allele</p> Signup and view all the answers

    Which type of allele would be likely to hide the presence of a recessive allele at a genetic locus?

    <p>Dominant allele</p> Signup and view all the answers

    When a dominant allele masks the expression of a recessive allele, what genetic concept is being illustrated?

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

    What term describes the phenomenon where one gene's expression is dependent on another gene's presence?

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

    What does a high h2 indicate about a trait?

    <p>The trait is effective and under genetic control</p> Signup and view all the answers

    How does h2 relate to the effectiveness of trait selection?

    <p>Lower h2 indicates more effective trait selection</p> Signup and view all the answers

    In the context of genetics, what does it mean if a trait has a low h2?

    <p>The trait is not under genetic control</p> Signup and view all the answers

    How does the effectiveness of selection change with a low h2?

    <p>Selection becomes less effective</p> Signup and view all the answers

    What can be inferred about a trait with a high h2 and effective selection?

    <p>The trait is under genetic control and responds well to selection</p> Signup and view all the answers

    What is the phenotype of the heterozygote if the gene exhibits complete dominance?

    <p>It has an equal effect as the homozygote.</p> Signup and view all the answers

    What does a low h2 value indicate about select?

    <p>Select is ineffective</p> Signup and view all the answers

    How does a low h2 value relate to environmental influence?

    <p>Trait is more under the environmental influence</p> Signup and view all the answers

    If a gene displays complete dominance, what would be the metric value of the AaBb heterozygote based on the example provided?

    <p>20 kg/du</p> Signup and view all the answers

    How does complete dominance affect the expression of genes in heterozygotes?

    <p>It masks the expression of the recessive allele.</p> Signup and view all the answers

    In the context of the text, what does 'ineffective' mean?

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

    Why might an ineffective select be problematic?

    <p>Does not achieve the desired outcome</p> Signup and view all the answers

    What happens to the phenotype of a heterozygote if a gene does not exhibit complete dominance?

    <p>It shows an intermediate phenotype between the homozygotes.</p> Signup and view all the answers

    What is implied about a trait when it is more under environmental influence?

    <p>It is less genetically determined</p> Signup and view all the answers

    In terms of gene expression, what is unique about complete dominance in heterozygotes?

    <p>The dominant allele completely suppresses the recessive allele.</p> Signup and view all the answers

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