Non-Mendelian Genetics

A roan cow shows co-dominance in fur color (orange & white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

• 4: Orange and White

• 1: Orange : 1 White

• 2 Orange: 2 Orange and White: 0 White

• 1: Orange: 2 Orange and White: 1 White

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

• Codominance

• Incomplete dominance

• Polygenic traits

Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?

• Red

• Red and White

• White

• Pink

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NGSS.HS-LS3-1

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In butterfly bushes, dark purple and pink parents will produce offspring with lavender flowers. This is a result of 

• codominance

• incomplete dominance

• complete dominance

• recessive dominance

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A gene that is controlled by more than two alleles

• MULTIPLE ALLELES

• PLEIOTROPY

Pattern of heredity in which both alleles are simultaneously expressed in the heterozygote

• CODOMINANCE

• MULTIPLE ALLELES

Black and white checkered chickens is an example of ______.

• Codominance

• Incomplete dominance.

• Polygenic characteristics

Controlled by more than one gene.

• Codominance

• Incomplete dominance.

• Polygenic characteristics

Incomplete dominance or co-dominance?
A calico cat shows both the traits for orange fur and black fur. 

• Incomplete Dominance

• Co-dominance

• Complete dominance

• Mendelian dominance

A breed of chicken shows incomplete dominance for feather color. One dominant allele codes for black feathers, another dominant allele codes for white feathers. The feathers of heterozygous chickens of this breed will be....

• all black

• all white

• all gray

• speckled black and white

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NGSS.HS-LS3-1

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