What is the phenotypic ratio of a single pair of contrasting traits in the $F_2$ generation of a dihybrid cross?

If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant,the offspring would be

The crossing of a homozygous tall plant with a dwarf plant in the $F_2$ generation would yield plants in which ratio?

In a monohybrid cross experiment,the genotypic ratio of the progeny in the $F_2$ generation is ....

$A$ true-breeding plant producing red flowers is crossed with a pure-breeding plant producing white flowers. The allele for the red color of the flower is dominant. After selfing the plants of the first filial $(F_1)$ generation, the proportion of plants producing red and white flowers in the progeny would be:

When the $F_1$ hybrid $Tt$ is crossed with the recessive parent $tt$,it is a case of....