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 new phenotype that is a blend of the two traits.

Front

What is Co-Dominance?

Back

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

Front

What is the phenotype of a snapdragon flower with genotype Rr?

Back

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

Front

If a red flower (RR) is crossed with a white flower (rr), what will be the genotype of the offspring?

Back

All offspring will have the genotype Rr.

Front

What percentage of offspring will inherit blood type O if both parents are heterozygous for blood type A (IAi)?

Back

0%.

Front

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

Back

The recessive allele is not expressed in the phenotype when a dominant allele is present.

Front

What is the result of a cross between two homozygous individuals with different traits?

Back

All offspring will be heterozygous and express the dominant trait.

Front

What does it mean if a trait is said to be 'blended' in inheritance?

Back

It refers to incomplete dominance, where the phenotype is a mix of both parental traits.

Front

In a cross between a homozygous dominant and a homozygous recessive, what is the expected genotype ratio of the offspring?

Back

All offspring will be heterozygous.

Front

What is an example of Co-Dominance in humans?

Back

AB blood type, where both A and B alleles are expressed.