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WorksheetsPolygenic Inheritance Review
Total questions: 15
Worksheet time: 20mins
What type of inheritance is determined by multiple genes and there can be a range of traits?
Codominance
Incomplete dominance
Polygenic traits
What type of distribution does polygenic inheritance follow?
logistic growth
exponential growth
bell-shaped curve
Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)
polygenic inheritance
multiple alleles
linked genes
incomplete dominance
If a persons genotype was AABbCc for height. How many genes do they have for this trait?
6
3
4
5
Human eye color is controlled by three different genes, and affected by a dozen more. This is an example of:
complete dominance
incomplete dominance
codominance
polygenic inheritance
multiple alleles
People come in a wide variety of heights. What is the best explanation for this?
complete dominance
incomplete dominance
codominance
polygenic inheritance
multiple alleles
How do environmental factors interact with polygenic inheritance?
Environmental factors can modify the phenotypic expression of polygenic traits.
Environmental factors can completely override polygenic inheritance.
Polygenic inheritance is solely determined by genetic factors.
Environmental factors have no effect on polygenic inheritance.
What are some examples of traits that are influenced by polygenic inheritance?
Blood type, fingerprint pattern, earlobe shape
Hair color, weight, shoe size
Height, skin color, eye color
Musical talent, athletic ability, sense of humor
What is the role of multiple genes in polygenic inheritance?
Multiple genes contribute to the expression of a trait.
Polygenic inheritance is not influenced by multiple genes.
Multiple genes have no effect on the expression of a trait.
Only one gene is responsible for polygenic inheritance.
Which of the following best describes polygenic inheritance?
Traits determined by environmental factors only
Traits influenced by multiple genes
Traits controlled by a single gene
Traits that are not inherited
Which of the following is NOT an example of a polygenic trait?
Blood type
Height
Eye color
Skin color
Which of the following traits can be influenced by both genetics and environment?
Blood type
Height
Weight
Eye color
Polygenic means that _________ control a characteristic.
How does polygenic inheritance contribute to human traits such as height and skin color?
By allowing a single gene to determine the trait
By involving multiple genes, each adding a small amount to the value of the trait
By ensuring that the traits do not vary among individuals
