There is a "frustrating" overemphasis on the importance of individual genes for traits or diseases, says Gene Expression's Razib Khan. But there is also an underestimation of the importance of genetics as a whole. "How can these be reconciled? Do not genes and genetics go together?" he asks. The solution to this may be a simple one, he adds — "when you speak of 1,000 genes, you speak of no genes. You can't list 1,000 genes in prose, even if you know them.