In Mirabilis, a hybrid for red $(RR)$ and white $(rr)$ flower produces pink $(Rr)$ flower. A plant with pink flower is crossed with white flower, the expected phenotypic ratio is
Red : pink: white $(1: 2: 1)$
Pink : white $(1: 1)$
Red : pink $(1:1)$
Red : white $(3: 1)$
$RR$ $(Red)$ is crossed with $ww$ $(white)$, all the $Rw$ offsprings are pink. This is an indication that $R$ gene is
In $F_2$ generation of monohybrid cross the cause of $1 : 2 : 1$ phenotypic ratio is
In case of incomplete dominance in $F_2$ generation
Assertion : In Mirabilis, selfing of $F_1$ pink flower plants produces same phenotypic & genotypic ratio.
Reason : Flower colour gene shows incomplete dominance.
In snapdragon / antirrhinum, hybrid between red and white flowered plants is pink flowered. This is .