Genetics and Genetic Engineering: Additive Genes and Pigmentation
17 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is polygenic inheritance?

  • Inheritance controlled by a single gene
  • Inheritance of a single characteristic
  • Inheritance influenced by multiple genes (correct)
  • Inheritance controlled by environmental factors

    • What type of variation is seen in quantitative genetics?

  • Continuous variation (correct)
  • Discrete variation
  • Discontinuous variation
  • Qualitative variation

    • What is the focus of quantitative genetics?

  • Populations (correct)
  • Individual organisms
  • Genes
  • Species

    • How is quantitative genetics analyzed?

    <p>By statistical analysis of mean and standard deviation</p> Signup and view all the answers

    What is the effect of environment on quantitative genetics?

    <p>Greatly affected</p> Signup and view all the answers

    How does polygenic control differ from single gene effect?

    <p>Polygenic control involves multiple genes, single gene effect involves one gene</p> Signup and view all the answers

    What is the effect of dominant alleles on the degree of color in polygenic inheritance?

    <p>Increase the degree of color</p> Signup and view all the answers

    What is the ratio of black to dark to intermediate to white phenotypes in the F2 generation?

    <p>1:4:6:4</p> Signup and view all the answers

    What is the challenge in calculating the phenotypic ratio in polygenic inheritance?

    <p>Many genes are involved</p> Signup and view all the answers

    What is the genotype of the F1 generation offspring in the cross between a black and a white individual?

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

    What is the probability of a black phenotype in the F2 generation?

    <p>1/16</p> Signup and view all the answers

    What type of inheritance is described in the text?

    <p>Polygenic inheritance</p> Signup and view all the answers

    What is the ratio of individuals in F2 that resemble either parent in a polygenic trait?

    <p>1/4n</p> Signup and view all the answers

    If a trait is controlled by 5 pairs of genes, what is the ratio of individuals in F2 that resemble either parent?

    <p>1/1024</p> Signup and view all the answers

    How many phenotypic classes are expected in a trait controlled by 3 pairs of genes?

    <p>7</p> Signup and view all the answers

    What determines the possible potential limit of a phenotype?

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

    Which of the following statements is true about polygenic inheritance?

    <p>Multiple genes control the trait</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser