Incomplete Dominance and Codominance

Front

What is incomplete dominance?

Back

Incomplete dominance is an inheritance pattern where the offspring display a mixture of the traits from both parents, resulting in a phenotype that is intermediate between the two.

Front

What is codominance?

Back

Codominance is an inheritance pattern where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits simultaneously.

Front

Give an example of incomplete dominance.

Back

An example of incomplete dominance is when a red flower (RR) is crossed with a white flower (WW), resulting in pink flowers (RW).

Front

Give an example of codominance.

Back

An example of codominance is in calico cats, where both black and orange fur colors are expressed in the same individual.

Front

What is the result of a cross between a tall plant (TT) and a short plant (SS) in incomplete dominance?

Back

The result is a medium plant (TS), which is an intermediate phenotype.

Front

In a genetic cross, what does a 50% calico offspring mean?

Back

It means that out of all the offspring produced, half will display the calico phenotype, showing both black and tan colors.

Front

What is the main difference between incomplete dominance and codominance?

Back

In incomplete dominance, the traits blend to form an intermediate phenotype, while in codominance, both traits are fully expressed without blending.

Front

What type of inheritance pattern is shown when a blue flower and a yellow flower produce green offspring?

Back

This is an example of incomplete dominance.

Front

If a plant with genotype Aa is crossed with another Aa plant, what is the expected phenotypic ratio?

Back

The expected phenotypic ratio is 1:2:1, with one showing the dominant trait, two showing the intermediate trait, and one showing the recessive trait.

Front

What does it mean if a trait is not completely dominant over another?

Back

It means that the phenotype of the offspring is a blend of both parental traits, characteristic of incomplete dominance.