A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

In $F_2$ generation of monohybrid cross the cause of $1 : 2 : 1$ phenotypic ratio is

What is the phenotypic and genotypic ratio of incomplete dominance ?

The phenotype of an individual may be affected if the modified allele produces

$(a)$ No enzyme at all
$(b)$ The normal/less efficient enzyme
$(c)$  $A$ non-functional enzyme

In Antirrhinum two plants with pink flowers were hybridized. The $ F_1$ plants produced red, pink and white flowers in the proportion of $1$ red, $2$ pinkand $1$ white. What could be the genotype of the two plants used for hybridization ? Red flower colour is determined by $RR$, and white by $rr$ genes?