How many types of gametes may be produced by genotype $D/d : E/e : F/f$?

What type of gametes will be formed by the genotype $RrYy$?

In a dihybrid cross where two parents differ in their traits,such as yellow seeds $(YY)$ with round shape $(RR)$ and green seeds $(yy)$ with wrinkled shape $(rr)$,how many seeds out of the total $16$ in the $F_2$ generation will be green $(yy)$?

Pure homozygous offspring in a dihybrid cross in the ${F_2}$ generation will be:

When a pure tall pea plant with green pods is crossed with a dwarf plant with yellow pods, how many $F_2$ offspring out of $16$ will be tall?

The dihybrid test cross ratio of $1: 1: 1: 1$ proves that