Types of genotype observed in a dihybrid cross are

$A$ diploid organism is heterozygous for $4$ loci. How many types of gametes can be produced?

In a plant, tallness is dominant over dwarfness and red flower is dominant over white. Starting with the parents, work out a dihybrid cross. What is the standard dihybrid ratio? Do you think the values would deviate if the two genes in question are interacting with each other?

How many different kinds of gametes may be produced by an organism with the genotype $RrYy$?

In Mendel's dihybrid cross,how many types of offspring were obtained in the $F_2$ generation that were different from the parental types?

Genes $R$ and $Y$ follow independent assortment. If $RRYY$ produces round yellow seeds and $rryy$ produces wrinkled green seeds,what will be the phenotypic ratio of the $F2$ generation?