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Incomplete Dominance

Test your understanding of Incomplete Dominance, a fascinating genetic phenomenon where neither allele is dominant over the other.

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

In incomplete dominance, the heterozygous genotype results in:

  1. A blend of the two phenotypes
  2. An intermediate phenotype
  3. A dominant phenotype
  4. A recessive phenotype
Question 2 Multiple Choice (Single Answer)

Which of these is an example of incomplete dominance in plants?

  1. Red and white flowers producing pink flowers
  2. Tall and short plants producing medium-height plants
  3. Round and wrinkled seeds producing oval seeds
  4. Brown and black fur in dogs producing spotted fur
Question 3 Multiple Choice (Single Answer)

What is the genotypic ratio of a cross between two heterozygous individuals in incomplete dominance?

  1. 1:2:1
  2. 3:1
  3. 1:1
  4. 9:3:3:1
Question 4 Multiple Choice (Single Answer)

Incomplete dominance is also known as:

  1. Partial dominance
  2. Codominance
  3. Blended inheritance
  4. All of the above
Question 5 Multiple Choice (Single Answer)

Which of these is NOT an example of incomplete dominance?

  1. Andalusian horses with a roan coat color
  2. Red and white carnations producing pink carnations
  3. Black and white chickens producing gray chickens
  4. Brown-eyed and blue-eyed parents having green-eyed children
Question 6 Multiple Choice (Single Answer)

In incomplete dominance, the heterozygous phenotype is:

  1. Identical to the dominant phenotype
  2. Identical to the recessive phenotype
  3. A blend of the two phenotypes
  4. None of the above
Question 7 Multiple Choice (Single Answer)

What is the phenotypic ratio of a cross between two heterozygous individuals in incomplete dominance?

  1. 3:1
  2. 1:2:1
  3. 9:3:3:1
  4. 1:1
Question 8 Multiple Choice (Single Answer)

Which of these is an example of incomplete dominance in animals?

  1. Andalusian horses with a roan coat color
  2. Red and white carnations producing pink carnations
  3. Black and white chickens producing gray chickens
  4. Brown-eyed and blue-eyed parents having green-eyed children
Question 9 Multiple Choice (Single Answer)

Incomplete dominance is observed in:

  1. Homozygous dominant individuals
  2. Heterozygous individuals
  3. Homozygous recessive individuals
  4. All of the above
Question 10 Multiple Choice (Single Answer)

Which of these is NOT a characteristic of incomplete dominance?

  1. The heterozygous phenotype is intermediate between the homozygous phenotypes
  2. The heterozygous phenotype is identical to one of the homozygous phenotypes
  3. The heterozygous phenotype is a blend of the two homozygous phenotypes
  4. The heterozygous genotype has equal contributions from both alleles
Question 11 Multiple Choice (Single Answer)

In incomplete dominance, the heterozygous genotype is:

  1. RR
  2. Rr
  3. rr
  4. None of the above
Question 12 Multiple Choice (Single Answer)

What is the probability of obtaining a heterozygous offspring from a cross between two heterozygous individuals in incomplete dominance?

  1. 1/4
  2. 1/2
  3. 3/4
  4. 1
Question 13 Multiple Choice (Single Answer)

Which of these is an example of incomplete dominance in humans?

  1. ABO blood group system
  2. Cystic fibrosis
  3. Sickle cell anemia
  4. Huntington's disease
Question 14 Multiple Choice (Single Answer)

Which of these is NOT a consequence of incomplete dominance?

  1. Increased genetic diversity
  2. Production of new phenotypes
  3. Masking of recessive alleles
  4. Reduced fitness of heterozygous individuals
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