Incomplete & Codominance

Front

What is incomplete dominance?

Back

A type of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is codominance?

Back

A type of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

Front

What is a hybrid organism?

Back

An organism that has two different alleles for a trait, such as Bb.

Front

What are alleles?

Back

Different forms of a gene that determine specific traits.

Front

If a red flowered plant (RR) and a white flowered plant (WW) breed, what will the offspring look like in terms of flower color under incomplete dominance?

Back

All offspring will have pink flowers (RW).

Front

In a cross between a homozygous red flower (RR) and a homozygous white flower (WW), what is the genotype of the offspring?

Back

All offspring will be heterozygous (RW).

Front

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

Back

1:2:1 ratio of phenotypes.

Front

What is the genotypic ratio of a monohybrid cross involving codominance?

Back

1:2:1 ratio of genotypes.

Front

What does it mean if a trait is dominant?

Back

It means that the trait will be expressed in the phenotype even if only one dominant allele is present.

Front

What does it mean if a trait is recessive?

Back

It means that the trait will only be expressed in the phenotype if two recessive alleles are present.