Human Genetics: Multifactorial Traits & Model Organisms Video


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question 1 of 3

Evaluate each of the following sets of data separately. Which of them provide evidence that the trait is polygenic?

I. The genotype at loci A, B and C each produces a protein that influences the length of an organism by an average of 0.6, 0.4 and 0.3 cm, respectively.

II. Three different alleles of gene D affect the length of an organism by an average of 0.6, 0.4 and 0.3 cm, respectively.

III. Loci E, F and G each modulates an independent pathway, which plays a role in determining the length of an organism.

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1. Which of the following statements could NOT be used to describe a multifactorial trait?


Which of the following statement(s) accurately describes an advantage provided by model organisms?

I. The laboratory environment can be controlled.

II. True-breeding strains can be generated.

III. Specific combinations of alleles can be engineered.

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About This Quiz & Worksheet

Taking a look at an alternative experimental system to study biological processes, this quiz and corresponding worksheet will help you gauge your knowledge of using model organisms to study genetics. Topics you'll need to know to pass the quiz include understanding how to find the traits that are polygenic from a given problem as well as knowing the characteristics of a multifactorial trait.

Quiz & Worksheet Goals

Use this printable worksheet and quiz to review:

  • Finding the polygenic traits
  • Characteristics of a multifactorial trait
  • Advantages of using a model organism

Skills Practiced

This worksheet and quiz will let you practice the following skills:

  • Interpreting information - verify you can read information regarding the characteristics of a multifactorial trait and interpret it correctly
  • Knowledge application - use your knowledge to answer questions about the advantages of using a model organism
  • Problem solving - use acquired knowledge to solve problems involving finding the polygenic traits

Additional Learning

Make sure to also review the corresponding lesson called Human Genetics and Model Organisms. The lesson will help you learn more about how the common fruit fly can aid in our research against disease. It will also help you:

  • Identify the two main types of traits
  • Show how a multifactorial trait is determined
  • Understand what makes a polygenic trait
  • Appreciate the difference between the types of traits
  • Describe how a model organism can help today's scientific knowledge