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 is neither dominant nor recessive.

Front

What phenotype results from a cross between a red radish (RR) and a white radish (WW) in codominance?

Back

All offspring will be purple (RW).

Front

What is the genotype of a brown mouse in incomplete dominance if black (BB) and white (bb) are the homozygous forms?

Back

The genotype for a brown mouse is Bb.

Front

What is the genotype for Roan color in cattle if red coats are represented as RR and white coats as WW?

Back

The genotype for Roan color is RW.

Front

What is the phenotype of a heterozygous individual in a case of incomplete dominance?

Back

The phenotype is a blend of the two homozygous phenotypes.

Front

In codominance, how are the alleles expressed in the phenotype?

Back

Both alleles are fully expressed in the phenotype.

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.

Front

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

Back

The expected phenotypic ratio is 1:2:1.

Front

What is the expected phenotypic ratio in a monohybrid cross involving codominance?

Back

The expected phenotypic ratio is also 1:2:1.