Incomplete Dominance and Codominance

Front

What is co-dominance?

Back

Co-dominance is a type of inheritance pattern where both alleles in a heterozygote are fully expressed, resulting in offspring that display both traits equally.

Front

What is incomplete dominance?

Back

Incomplete dominance is a type of inheritance where the traits of two alleles blend together in the phenotype of the offspring, resulting in a third phenotype that is a mix of the two.

Front

In co-dominance, how are traits expressed in the offspring?

Back

In co-dominance, both traits are expressed equally in the offspring, leading to a phenotype that shows characteristics of both parent traits.

Front

Give an example of co-dominance.

Back

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

Front

What happens when a red flowered plant (RR) is crossed with a white flowered plant (WW) under incomplete dominance?

Back

All offspring will have pink flowers (RW) because the traits blend together.

Front

What is the phenotype of a heterozygote in incomplete dominance?

Back

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

Front

How does co-dominance differ from complete dominance?

Back

In complete dominance, one allele completely masks the effect of the other, while in co-dominance, both alleles are fully expressed.

Front

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

Back

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

Front

What type of inheritance pattern is shown when a flower has both red and white patches?

Back

This is an example of co-dominance.

Front

If a plant with genotype RW is crossed with another RW plant, what are the possible genotypes of the offspring?

Back

The possible genotypes are RR, RW, and WW.