The genotypic ratio is equal to the phenotypic ratio in case of:

(a) Monohybrid test cross
(b) ${\mathrm{F}}_2$ generation of Complete dominance
(c ) ${\mathrm{F}}_2$generation of Incomplete dominance
(d) ${\mathrm{F}}_2$generation of Dihybrid cross showing complete linkage 

The genotypic ratio is equal to the phenotypic ratio in case of monohybrid test cross and incomplete dominance. In monohybrid test cross, genotypic ratio= 1:1= Phenotypic ratio. In the ${\mathrm{F}}_2$ generation of incomplete dominance, Genotypic ratio= 1:2:1= Phenotypic Ratio.