What is incomplete dominance? Explain inheritance of flower colour in snapdragon

Explanation

Incomplete dominance:-
A phenomenon where both the alleles of a character express incompletely producing a new intermediate phenotype in the heterozygous conditions is called incomplete or partial dominance.
Example:- Flower colour in snapdragon.
Explanation:- Correns crossed homozygous red flowered plant (RR) with homozygous white flowered plant (rr). In `F_(1)` generation all hybrids were pink flowered plants (Rr). Because the dominant gene(R) fails to mask the recessive gene(r) completely. When `F_(1)` pink flowering plants were self crossed, the `F_(2)` generation produce `25%` red flowered plants, `50%` pink flowered plants and `25%` white flowered plants in `1:2:1` ratio.