Genetics: Dominance in Traits
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Questions and Answers

What is true about alleles in relation to dominance?

  • All alleles contribute equally to the phenotype.
  • Alleles have no impact on traits.
  • Only recessive alleles can appear in the phenotype.
  • One allele often dominates and obscures the presence of another. (correct)
  • In a typical F₂ generation, what proportion of offspring would be expected to show the dominant trait?

  • 1/2 will show the dominant trait.
  • 1/4 will show the dominant trait.
  • All offspring will show the dominant trait.
  • 3/4 will show the dominant trait. (correct)
  • Which of the following statements about traits in the F₂ generation is accurate?

  • The F₂ generation expresses traits derived from both parents of the P generation. (correct)
  • The F₂ generation shows a uniform expression of all traits.
  • The traits in the F₂ generation have no relation to the traits of the P generation.
  • The traits in the F₂ generation come exclusively from only one parent.
  • How do dominant and recessive alleles interact in determining an organism's traits?

    <p>Dominant alleles typically mask the expression of recessive alleles.</p> Signup and view all the answers

    What represents the concept of the 'Rule of Dominance'?

    <p>One dominant allele can mask the effect of a recessive allele.</p> Signup and view all the answers

    Study Notes

    Dominance in Traits

    • Usually, one allele is dominant and hides the recessive allele
    • Organisms have two factors (genes) that control traits
    • Alleles are different forms of a gene
    • Example: Tall vs. short, yellow vs. green
    • 3/4 of F2 generation were tall
    • 1/4 of F2 generation were short
    • F2 generation has traits from both parents in the P generation

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    Description

    Explore the concept of dominance in genetic traits through this quiz. Understand how alleles interact to determine physical characteristics in organisms, using examples such as tall and short plants. Test your knowledge on the F2 generation and the inheritance of traits.

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