7.2 Polygenic

What type of inheritance is determined by multiple genes and there can be a range of traits?

• Codominance

• Incomplete dominance

• Polygenic traits

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A single gene has 3 or more alleles. These are called

• multiple genes

• multiple alleles

• codominance

• polygenic traits

This is when a trait is controlled by more than one gene.

• Multiple alleles
• Polygenetic inheritance
• Codominance
• Incomplete Dominance 

Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)

• polygenic inheritance

• multiple alleles

• linked genes

• incomplete dominance

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If a persons genotype was AABbCc for height. How many genes do they have for this trait?

• 6

• 3

• 4

• 5

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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

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The gene for human blood type has three alleles, A, B and O. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

This flower is produced by crossing a pink-flowering plant and a white-flowering plant. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

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If a dark brown horse and a white horse are bred, the offspring are palomino (tan). This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

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Fur color in rabbits is controlled by a single gene. There are many different phenotypes. What is the best explanation for this?

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

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