Genetics--Patterns of Inheritance

Front

Which type of dominance occurs when one allele completely masks the effect of another allele?

Back

Complete dominance

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DOK Level 1: Recall

Front

In which type of dominance do both alleles contribute equally to the phenotype?

Back

Codominance

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DOK Level 1: Recall

Front

What is the phenotype of a heterozygous individual in incomplete dominance?

Back

A blend of both alleles

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DOK Level 1: Recall

Front

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

Back

A black chicken and a white chicken producing speckled offspring

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DOK Level 2: Skill/Concept

Front

Phenotype of offspring in a cross between red-flowered plant (RR) and white-flowered plant (WW) with incomplete dominance?

Back

Pink flowers

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DOK Level 2: Skill/Concept

Front

If a person has one allele for type A blood and one allele for type B blood, what is their blood type?

Back

Type AB

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DOK Level 1: Recall

Front

Which scenario 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

Back

A tall plant and a short plant producing tall offspring

Tags

DOK Level 2: Skill/Concept

Front

In a genetic cross showing incomplete dominance, what would be the expected phenotype ratio of the offspring if both parents are heterozygous?

Back

1:2:1

Tags

DOK Level 2: Skill/Concept

Front

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

Back

Codominance

Tags

DOK Level 1: Recall

Front

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

Back

The alleles blend to produce a new phenotype.

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DOK Level 3: Strategic Thinking