Multiple choice

Which of the following best explains the threshold model?

  1. A quantitative multifactorial trait

  2. A polygenic multifactorial trait

  3. A multifactorial trait results in a non-disease phenotype such as height

  4. A multifactorial trait exhibits all or none phenotype.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The threshold model postulates that the phenotype is absent until a threshold of liability is reached, after which the phenotype is expressed.

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