F₂-generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of

Monohybrid cross with incomplete dominance shows the same genotypic and phenotypic ratio, i.e. I : 2 : l, as depicted by the cross given below
 

Genotypic ratio - 1 (AA) : 2 (Aa) : 1 (aa)
Phenotypic ratio - 1 (Red) : 2 (pink) : 1 (white)