This theory was popular in the 19th century before the discovery of genes and chromosomes. It proposed that traits from both parents were mixed together like paint, resulting in offspring with intermediate characteristics. For example, if one parent had red flowers and the other had white flowers, blending inheritance predicted that their offspring would have pink flowers.
However, blending inheritance was later proven to be incorrect. Gregor Mendel's experiments with pea plants demonstrated that traits are inherited through discrete units called genes, and these genes are passed down from parents to offspring in a predictable pattern.
While blending inheritance is no longer considered a valid explanation of inheritance, it is still a useful concept to understand how people thought about heredity before the discovery of genes. It also helps us understand the limitations of our understanding of complex traits that are influenced by multiple genes.
