${F_1}$ hybrid is intermediate between the two parents. The phenomenon is

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

Describe incomplete dominance.  

In case of incomplete dominance in $F_2$ generation

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?

In Mirabilis jalapa, when homozygous red-flowered and white-flowered plants are crossed, all $F_1$ plants have pink-coloured flowers. In $F_2$ produced by selfing of $F_1$ individuals, red, pink and white flowered plants appear respectively in the ratio of or What will be the ratio in $F_2$ generation if red-flowered variety of Mirabilis jalapa is crossed with white-flowered variety