Identify the phenotypic ratio of Incomplete dominance.

The phenotypic ratio of Incomplete dominance is 1 : 2 : 1.
Incomplete dominance results from a cross in which each parental contribution is genetically unique and gives rise to progeny whose phenotype is intermediate.
Incomplete dominance is also referred to as semi-dominance and partial dominance. Mendel described dominance but not incomplete dominance.
A cross of two F1 hybrids, heterozygous for a single trait that displays incomplete dominance is predicted to give a 1 : 2 : 1 ratio among both the genotypes and phenotypes of the offspring.