Neither of the alleles of a gene completely dominates the other.
Both the alleles of a gene dominate equally and express themselves in heterozygous condition.
Phenotype of hybrids is intermediate between phenotypes of the parents.
Products of both the alleles are observed in the phenotype of the hybrid.
Example: Pink coloured flowers in Snapdragon (Antirrhinum majus) produced as a result of crossing Red flower with White flower)
Example: Blood Group AB in human beings.