Incomplete and Codominance

Front

What is incomplete dominance?

Back

A genetic situation in which one allele does not completely dominate another allele, resulting in a phenotype that is a blend of the two traits.

Front

What is codominance?

Back

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

Front

What color flowers do Rr snapdragons produce?

Back

Pink, due to incomplete dominance between red (RR) and white (rr) alleles.

Front

What is the genotype for red carnations in codominance?

Back

RR.

Front

What is the genotype for white carnations in codominance?

Back

WW.

Front

What is the genotype for speckled carnations in codominance?

Back

RW.

Front

In a complete dominance cross, what happens to the recessive allele?

Back

It is completely masked by the dominant allele.

Front

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

Back

A blend of the two traits.

Front

What is the phenotype of a homozygous dominant genotype in complete dominance?

Back

The dominant trait is expressed.

Front

What is the phenotype of a homozygous recessive genotype in complete dominance?

Back

The recessive trait is expressed.