I want to know the answer to the following question:
How is the relationship between genes and complex traits understood?
All the background I'm provided with is that "In his 2003 paper, "Human Genetic Diversity: Lewontin's Fallacy", A. W. F. Edwards argued that rather than using a locus-by-locus analysis of variation to derive taxonomy, it is possible to construct a human classification system based on characteristic genetic patterns, or clusters inferred from multilocus genetic data.". Is that enough to answer the question?