Incomplete and Codominance

Front

What is codominance?

Back

A genetic condition where both alleles for a gene are fully expressed, resulting in offspring with a phenotype that shows both traits distinctly.

Front

What is incomplete dominance?

Back

A genetic condition where the phenotype of heterozygotes is intermediate between the phenotypes of the two homozygotes.

Front

Give an example of codominance in flowers.

Back

In flowers, red (RR) and blue (BB) alleles can produce speckled flowers (RB) when crossed.

Front

What is the phenotypic ratio when crossing a red flower (RR) with a speckled flower (RB)?

Back

2 red flowers and 2 speckled flowers.

Front

What is the difference between codominance and incomplete dominance?

Back

In codominance, both traits are fully expressed, while in incomplete dominance, the traits blend to form a new phenotype.

Front

What type of inheritance pattern is shown when a red flower and a blue flower produce purple flowers?

Back

This is an example of incomplete dominance.

Front

What is the expected phenotype ratio in a codominance cross between a red flower (RR) and a blue flower (BB)?

Back

1 red, 1 blue, 1 speckled.

Front

Define the term 'allele'.

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, specifically the alleles present.