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Questions and Answers
Which of the following best describes a quantitative trait locus (QTL)?
Which of the following best describes a quantitative trait locus (QTL)?
- A section of DNA that is associated with a phenotypic trait in an individual
- A section of DNA that controls the genetic architecture of a trait
- A section of DNA that correlates with variation of a quantitative trait in a population (correct)
- A section of DNA that causes a trait variation in a population
How are QTLs mapped?
How are QTLs mapped?
- By identifying the genetic architecture of a trait
- By identifying the actual genes that cause the trait variation
- By identifying the number of QTLs that explain variation in the phenotypic trait
- By identifying molecular markers that correlate with an observed trait (correct)
What does the number of QTLs indicate about the genetic architecture of a trait?
What does the number of QTLs indicate about the genetic architecture of a trait?
- The number of genes that contribute to the trait variation
- The number of QTLs that explain variation in the phenotypic trait (correct)
- The number of chromosomes that contain QTLs
- The number of genes that control the trait
What types of traits do QTLs typically underlie?
What types of traits do QTLs typically underlie?
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What are polygenic effects?
What are polygenic effects?
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True or false: A quantitative trait locus (QTL) is a section of DNA that correlates with variation of a qualitative trait in the phenotype of a population of organisms.
True or false: A quantitative trait locus (QTL) is a section of DNA that correlates with variation of a qualitative trait in the phenotype of a population of organisms.
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True or false: QTLs are mapped by identifying which molecular markers correlate with an observed trait.
True or false: QTLs are mapped by identifying which molecular markers correlate with an observed trait.
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True or false: QTLs are often found on the same chromosome.
True or false: QTLs are often found on the same chromosome.
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True or false: The number of QTLs indicates the genetic architecture of a trait.
True or false: The number of QTLs indicates the genetic architecture of a trait.
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True or false: QTLs are only associated with discrete traits.
True or false: QTLs are only associated with discrete traits.
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