Blending inheritance is an obsolete theory in biology from the 19th century. The theory is that the progeny inherits any characteristic as the average of the parents' values of that characteristic.

What is meant by blending inheritance?

: the expression in offspring of phenotypic characters (such as pink flower color from red and white parents) intermediate between those of the parents also : inheritance in a now discarded theory in which the genetic material of offspring was held to be a uniform blend of that of the parents.

How does blending inheritance work?

The discredited theory that inheritance of traits from two parents produces offspring with characteristics that are intermediate between those of the parents. The definition of blending inheritance is the combining of features or qualities of both parents in their children.