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Incomplete Dominance - A Genetics Definition

By Regina Bailey, About.com

Pink Snapdragon

Pink Snapdragon

Rosendahl/Public Domain Image
Definition: Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely dominant over the other allele. This results in a combined phenotype.

Related Terms: Allele, Genes, Heterozygous, Phenotype
Examples: In cross-pollination experiments between red and white snapdragon plants, the resulting offspring are pink. The dominant allele that produces the red color is not completely expressed over the recessive allele that produces the white color.

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