Question

Explain how Mendel's experiments with seed color disproved the common belief of blending inheritance.

Answer 1

Blending inheritance was the idea that an inherited trait would be a blending of the traits of the parents. Mendel's experiments disproved this by showing that the offspring of two plants of different color were bread the result was not a mix, but rather that one of the color traits was dominant and was expressed by all offspring. He also found that when using self-fertilizization a proportion of the offspring exhibited the color not found in the parent.

Answer 2

The theory of blending inheritance was used to describe an actual blending of our alleles, that together would form a new allele. For example, skin color and height would be the result of the blend of the parent's alleles.
This theory doesn't explain why some traits disapear or are discrete.
On the other hand, Mendel's experiments with seed colors explains it. He demonstrated that genes are inherited in pairs and that in hybrid organisms, dominant versions of that gene, could hide the presence of a recessive version of that same gene.