Incomplete Dominance in Genetics Quiz

What is the key difference between incomplete dominance and basic dominant-recessive inheritance?

• Incomplete dominance results in a recessive phenotype.

• Incomplete dominance only occurs in plants.

• Heterozygous phenotypes are intermediate in incomplete dominance.

• Incomplete dominance involves a third allele.

In the context of incomplete dominance, how are different alleles typically represented?

• Using numbers.

• Using superscripts.

• Using symbols.

• Using lowercase letters only.

What role does the protein play in the color of the four o'clock flower?

• It creates a new pigment.

• It turns a pre-pigment into a pigment.

• It removes all pigments.

• It changes the flower's shape.

What is the phenotype of a heterozygous four o'clock flower?

• Red

• Yellow

• White

• Pink

In incomplete dominance, what is the phenotype of a homozygous red flower?

• Yellow

• Pink

• White

• Red

What is the phenotype of a homozygous white flower in the four o'clock example?

• Pink

• White

• Yellow

• Red

What is the function of the W allele in the four o'clock flower example?

• It changes the flower's scent.

• It enhances pigment production.

• It produces a defective protein.

• It produces a functional protein.

When using a Punnett square for incomplete dominance, what is the expected phenotype ratio of offspring from a homozygous red and a homozygous white flower?

• 100% red

• 100% white

• 50% red, 50% white

• 100% pink

What is the expected genotypic ratio when two heterozygous pink flowers are crossed?

• 2:1:1 (red:pink:white)

• 1:2:1 (red:pink:white)

• 1:1 (red:white)

• 3:1 (pink:white)

What percentage of offspring are expected to be pink when two pink four o'clock flowers are crossed?

• 25%

• 75%

• 100%

• 50%