Incomplete Dominance & Codominace

Front

What is Incomplete Dominance?

Back

A genetic situation where one allele is not completely dominant over another, resulting in a blended phenotype in heterozygous individuals.

Front

What is Codominance?

Back

A genetic situation where both alleles in a heterozygous individual are fully expressed, resulting in offspring with a phenotype that shows both traits.

Front

What is the genotype for Roan color in cattle?

Back

RW (Red and White coat color expressed together).

Front

If a red flower (RR) is crossed with a blue flower (BB), what is the expected phenotype of the offspring?

Back

4 speckled flowers (RB).

Front

What phenotype results from Incomplete Dominance?

Back

A blended phenotype, such as pink flowers from red (RR) and white (WW) parents.

Front

What phenotype results from Codominance?

Back

A phenotype that shows both traits distinctly, such as speckled flowers from red (RR) and blue (BB) parents.

Front

In a cross between a red flower (RR) and a blue flower (BB), what are the genotypes of the offspring?

Back

All offspring will be RB (speckled).

Front

What is the difference between Incomplete Dominance and Codominance?

Back

Incomplete Dominance results in a blended phenotype, while Codominance results in both traits being fully expressed.

Front

Give an example of Incomplete Dominance in plants.

Back

An example is the crossing of red and white snapdragon flowers resulting in pink flowers.

Front

Give an example of Codominance in animals.

Back

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