What is the other name for "incomplete dominance"?

In $Mirabilis$ $jalapa$,when a homozygous red-flowered plant is crossed with a white-flowered plant,all $F_1$ plants produce pink flowers. When $F_1$ plants are self-pollinated,the resulting $F_2$ generation produces red,pink,and white flowers in the ratio of:

The phenomenon of incomplete dominance was observed by whom?

When the progeny obtained in the $F_1$ generation shows the expression of both genes present in its genotype, but the expression is not complete, which of the following characteristics can be applied?

In $Antirrhinum$ (Snapdragon),a cross between a white-flowered recessive plant $(ww)$ and a red-flowered dominant plant $(RR)$ results in $180$ plants in the $F_2$ generation. How many of these plants will have the same genotype as the parents?

In a cross between red and white flowered snapdragon ($Antirrhinum$ $sp.$),the $F_2$ generation has red,pink,and white flowered plants in the ratio of: