How many types of gametes will be produced by a diploid organism having genotype PPQQRR?

The number of types of gametes will be given by the formula $2^{\mathrm{n}}$
Where n is the number of heterozygous conditions
Given genotype is PPQQRR
The number of heterozygous condition present is 0
Therefore, the number of types of gametes will be $2^0$= 1
The gamete produced by the organism having the genotype of PPQQRR is PQR