Incomplete Dominance and Codominance Quiz

What is incomplete dominance?

• Incomplete dominance is a form of inheritance where the heterozygous phenotype is a blend of the two homozygous phenotypes.

• Incomplete dominance is a form of inheritance where the heterozygous phenotype is a combination of the two homozygous phenotypes.

• Incomplete dominance is a form of inheritance where the heterozygous phenotype is completely different from the homozygous phenotypes.

• Incomplete dominance is a form of inheritance where the heterozygous phenotype is the same as one of the homozygous phenotypes.

Tags

NGSS.HS-LS3-2

Give an example of incomplete dominance.

• Snapdragons

• Daisies

• Roses

• Tulips

Tags

NGSS.HS-LS3-2

What is codominance?

• Codominance is when only one allele of a gene is expressed in the phenotype of a heterozygous individual.

• Codominance is when the phenotype of a heterozygous individual is a blend of the phenotypes of the two alleles.

• Codominance is when the phenotype of a heterozygous individual is determined by the dominant allele only.

• Both alleles of a gene are expressed equally in the phenotype of a heterozygous individual.

Tags

NGSS.HS-LS3-2

Give an example of codominance.

• O blood type

• AB blood type

• B blood type

• A blood type

What happens in incomplete dominance when two different alleles are present?

• The dominant allele completely masks the recessive allele.

• The recessive allele completely masks the dominant allele.

• The two alleles combine to form a completely new phenotype.

• A new phenotype is produced that is a blend or intermediate of the two alleles.

What happens in codominance when two different alleles are present?

• Only one allele is expressed and contributes to the phenotype.

• The alleles cancel each other out and have no effect on the phenotype.

• Both alleles are expressed and contribute to the phenotype.

• The alleles combine to form a new allele that is expressed in the phenotype.

In incomplete dominance, what is the phenotype of the heterozygous individual?

• Blend or intermediate phenotype

• No phenotype

• Recessive phenotype

• Dominant phenotype

In codominance, what is the phenotype of the heterozygous individual?

• Only one trait

• No traits

• Random combination of traits

• Combination of both traits

What is the genotype of a homozygous individual in incomplete dominance?

• Aa

• AAA

• A

• AA or aa

What is the genotype of a homozygous individual in codominance?

• Two capital letters

• One capital letter and one lowercase letter

• One lowercase letter

• One capital letter