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

Explanation

It is a process where the dominant gene is incompletely dominant over the recessive gene and produces a phenotype which is intermediate to the parental type .
In Mirabills or `4^@` clock plant . Incomplete dominance has been reported with respect to colour of flower .In these plants some produce red flowers and some others produce white flowers. When a plant producing red flowers is crossed with a plant producing white flowers , in the `F_(1)` generation all plants produced pink flowers. It is a heterozygous condition and the pink character is an intermediate or a blend between red and white This colour is produced because the red is being only partially dominant over white . `p_(1)` red flowers `xx` white flowers
`F_(1)` Pink flower
When `F_(1) ` pink flower plants are self crossed to raise `F_(2)` progeny 3 types of plants are produced i.e. Red ,Pink and White , in the ratio of `1:2:1:` respectively .
By using appropriate symbols , the incomplete dominance can be represented as shown below . This cross is illustrated as indicated below by using appropriate letters.
Thus in this case , parental characters are expressed in homozygous conditions , and intermediate characters in heterozygous condition .