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?

What is the phenotypic and genotypic ratio of incomplete dominance ?

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

Assertion : In Mirabilis, selfing of $F_1$ pink flower plants produces same phenotypic & genotypic ratio.

Reason : Flower colour gene shows 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 certain plant species, red flower colour is incompletely dominant to white flower colour (the heterozygote is pink) and tall stems are completely dominant to dwarf stem. If a tall pink plant $(TtRr)$ is crossed with a tall white plant $(TTrr),$ which one of the following type of plants would be produced in the offsprings?