Genetics Quiz

What is codominance?

• A situation where one allele is completely dominant over another

• A situation where two alleles are equally dominant and both traits are expressed

• A situation where alleles blend to form an intermediate trait

• A situation where alleles are recessive

What does the term "multiple alleles" refer to?

• Two alleles determining a single phenotype

• Three or more alleles determining four or more phenotypes

• A single allele determining multiple phenotypes

• Alleles that are always recessive

What is the phenotype of offspring in codominance?

• A blend of both parents' phenotypes

• Only one parent's phenotype

• Both parents' phenotypes expressed equally

• A recessive phenotype

What is the result of crossing black and white chickens in codominance?

• Black chickens

• White chickens

• Black and white speckled chickens

• Gray chickens

Tags

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What is the phenotype of a cross between two pink snapdragons?

• Red flowers

• White flowers

• Pink flowers

• No flowers

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What is the main cause of sickle cell anemia?

• A virus

• A codominant gene

• A bacterial infection

• A recessive gene

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What is the effect of sickle cell anemia on red blood cells?

• They become larger

• They become crescent-shaped

• They become more flexible

• They become rounder

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What is the genotype for black fur in the mouse example?

• BB

• B'B'

• BB'

• B'B

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Which allele is recessive in determining blood type?

• I^A

• I^B

• i

• I^O

• Type A blood

• Type B blood

• Type AB blood

• Type O blood