Codominance vs incomplete dominance

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygous genotype are fully expressed, resulting in a phenotype that shows both traits simultaneously.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic scenario where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

Provide an example of codominance.

Back

An example of codominance is the AB blood type in humans, where both A and B alleles are expressed.

Front

Provide an example of incomplete dominance.

Back

An example of incomplete dominance is the flower color in snapdragons, where red (RR) and white (WW) flowers produce pink (RW) flowers.

Front

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

Back

The phenotype of a heterozygous genotype in incomplete dominance is a blend of the two parental traits.

Front

How does codominance differ from incomplete dominance?

Back

In codominance, both traits are fully expressed, while in incomplete dominance, the traits blend to form a new phenotype.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genotypes of a particular cross or breeding experiment.

Front

What does a Punnett square show in codominance?

Back

In codominance, a Punnett square will show offspring with distinct phenotypes representing both parental traits.

Front

What does a Punnett square show in incomplete dominance?

Back

In incomplete dominance, a Punnett square will show offspring with a blended phenotype that is intermediate between the two parental traits.

Front

What is the expected phenotype ratio in a cross showing incomplete dominance?

Back

The expected phenotype ratio in a cross showing incomplete dominance is typically 1:2:1.