Which genotype represents a true dihybrid condition?

When a dihybrid plant with dominant traits of red color and tall height $(RrTt)$ is crossed with a recessive plant having white color and dwarf height $(rrtt)$,what will be the phenotypic ratio of the offspring for red-tall,red-dwarf,white-tall,and white-dwarf respectively?

The following cross,$YyRr \times yyrr$ in garden pea plant,would result in the formation of

The following experiment is a dihybrid cross performed by Mendel. In which of the following are the green and wrinkled traits observed in the pea plants?

During a dihybrid cross, in the $F_2$ generation, the ratio of individuals showing one dominant and the other recessive character will be . . . . . . of the total population. (in $/16$)

In a plant,gene '$A$' is responsible for tallness and '$a$' is the recessive allele for dwarfness. Gene '$B$' is responsible for red flower color and '$b$' is the recessive allele for white flower color. $A$ plant with genotype $AaBb$ (tall and red) is crossed with a plant with genotype $aaBb$ (dwarf and red). What is the percentage of dwarf-white flowered plants in the progeny (in $\%$)?