How many types of gametes are produced by a dihybrid plant?

Which of the following is heterozygous for two pairs of alleles?

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 $\%$)?

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

If a plant having yellow and round seeds was crossed with another plant having green and wrinkled seeds,then the $F_{1}$-progeny are in the ratio:

In Mendel's dihybrid cross experiment,what was the phenotype of the $F_1$ generation that was self-pollinated?