Polygenic Inheritance Definition
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Questions and Answers

What is the main characteristic of polygenic inheritance?

  • Each gene has a significant effect on the phenotype
  • Multiple genes have an additive effect on a single trait (correct)
  • Only two genes contribute to the expression of the phenotype
  • Epistasis is involved, where an allele masks the effect of another allele
  • What is the effect of a single polygene on the phenotype?

  • It has a significant and dominant effect
  • It masks the effect of other alleles
  • It has no effect on the phenotype
  • It has a slight and cumulative effect (correct)
  • What is the relationship between alleles in polygenic inheritance?

  • There is complete dominance of one allele over the other
  • One allele is completely recessive to the other
  • There is no dominance, and alleles have a cumulative effect (correct)
  • Epistasis occurs, where one allele masks the effect of another
  • What is the pattern of variation in polygenic inheritance?

    <p>Continuous with a normal distribution</p> Signup and view all the answers

    Which of the following is an example of polygenic inheritance?

    <p>Skin pigmentation</p> Signup and view all the answers

    How many genes are responsible for the phenotype of height?

    <p>Around 400 genes</p> Signup and view all the answers

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