In which plant does the inheritance of flower color not follow Mendelian principles?

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,$2$ pink,and $1$ white. What could be the genotype of the two plants used for hybridization? Red flower color is determined by $RR$,and white by $rr$ genes.

Which cross produces red,white,and pink flower varieties in snapdragon (dog flower)?

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

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

Incomplete dominance is observed in . . . . . . .