Polygenicity Quotes

“Robert Plomin is among many who hold to the multigene view of behavioral traits and is quite sure this complexity explains the lack of success in implicating specific genes for specific behaviors. In an April 1994 article in Science, Plomin argued that all the evidence suggested that behavioral traits were not influenced by single major genes but by an array of genes, each with small effects. He views the single-gene approach as doomed to failure. While stressing the complexity, Plomin sees hope for progress in a different direction. “I’m interested in merging molecular genetics and quantitative genetics,” he says. “That’s what many of us are trying to do, not saying we think there’s a single gene and we hope to stumble on it. But rather let’s bring the light of molecular genetics into this dark alley and look for genes here. And that means we need approaches that will allow us to find genes that account for very small effects—not 20 percent of a trait’s cause, not 10 percent, but less than 1 percent. There are ways to do that. Association approaches. The Human Genome Project will speed up this sort of research.”
― William Wright, Born That Way: Genes, Behavior, Personality