Because blending inheritance ultimately results in homogenized populations full of intermediate genotypes, it is unable to explain how genetic variation can persist over evolutionary time (Charlesworth and Charlesworth, 2009).

How was blending theory disproved?

Mendel disproved the blending theory of genetics when he cross pollinated tall and short pea plants and the offspring were either tall or short, not medium like the blending theory of genetics suggests. …

How did Mendel show that the blending theory was incorrect?

Mendel noticed plants in his own garden that weren’t a blend of the parents. For example, a tall plant and a short plant had offspring that were either tall or short but not medium in height. Observations such as these led Mendel to question the blending theory. … He decided to experiment with pea plants to find out.