It is the inheritance of a single characteristic controlled by different alleles of the same gene. • F1 generation is the first filial generation offspring produced by crossing two parental strains. All the progeny of F1 generation were tall i.e. the traits of only one parent were visible.
• F2 generation is the second filial generation offspring produced by crossing F1’s. The F2 progeny were not all tall. Instead, one quarter of them was short indicating both the traits – that of tallness and shortness were inherited in the F2 plants.
Genotypic ratio – 1:2:1, Phenotypic ratio – 3:1