Patterns of Inheritance

Which of the following is an example of codominance?

• A red flower and a white flower producing pink offspring

• A black chicken and a white chicken producing speckled offspring

• A tall plant and a short plant producing medium height offspring

• A blue-eyed parent and a brown-eyed parent producing a brown-eyed child

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DOK Level 2: Skill/Concept

In a cross between a red-flowered plant (RR) and a white-flowered plant (WW) showing incomplete dominance, what would be the phenotype of the offspring?

• Red flowers

• White flowers

• Pink flowers

• Red and white flowers

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DOK Level 2: Skill/Concept

Which of the following scenarios best illustrates complete dominance?

• A red flower and a white flower producing pink offspring

• A black chicken and a white chicken producing speckled offspring

• A tall plant and a short plant producing tall offspring

• A blue-eyed parent and a brown-eyed parent producing a child with green eyes

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DOK Level 2: Skill/Concept

Which type of dominance is illustrated by a flower that has both red and white petals?

• Complete dominance

• Incomplete dominance

• Codominance

• Partial dominance

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DOK Level 1: Recall

Explain why a heterozygous individual with incomplete dominance does not show the dominant trait completely.

• The dominant allele is not strong enough to mask the recessive allele.

• Both alleles are expressed equally.

• The alleles blend to produce a new phenotype.

• The recessive allele is stronger than the dominant allele.

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DOK Level 3: Strategic Thinking

A plant with red flowers (RR) is crossed with a plant with white flowers (WW). If the resulting offspring have pink flowers, what type of dominance is this an example of?

• Complete dominance

• Incomplete dominance

• Codominance

• Partial dominance

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DOK Level 2: Skill/Concept

In a cross between a black chicken (BB) and a white chicken (WW), the offspring are all speckled (BW). What type of dominance does this illustrate?

• Complete dominance

• Incomplete dominance

• Codominance

• Partial dominance

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DOK Level 2: Skill/Concept

Describe a scenario where complete dominance is observed in a genetic cross.

• A red flower and a white flower producing pink offspring

• A black chicken and a white chicken producing speckled offspring

• A tall plant and a short plant producing tall offspring

• A blue-eyed parent and a brown-eyed parent producing a child with green eyes

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DOK Level 3: Strategic Thinking

If a flower shows incomplete dominance and has alleles R (red) and W (white), what would be the genotype and phenotype of a flower that is pink?

• Genotype: RR, Phenotype: Red

• Genotype: WW, Phenotype: White

• Genotype: RW, Phenotype: Pink

• Genotype: RW, Phenotype: Red and White

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DOK Level 2: Skill/Concept

How does codominance differ from incomplete dominance in terms of phenotype expression?

• In codominance, one allele is completely dominant over the other.

• In incomplete dominance, both alleles are equally expressed.

• In codominance, both alleles are fully expressed, while in incomplete dominance, the alleles blend.

• In incomplete dominance, one allele is completely dominant over the other.

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DOK Level 3: Strategic Thinking