Well, there's also the Human Microbiome Project: https://en.wikipedia.org/wiki/Human_Microbiome_Project https://en.wikipedia.org/wiki/Human_Microbiome_Project

Well, there's also the Human Microbiome Project: https://en.wikipedia.org/wiki/Human_Microbiome_Project https://en.wikipedia.org/wiki/Human_Microbiome_Project Although if you thought the genotype -> phenotype problem was hard, the microbiome -> phenotype problem is likely several orders of magnitude harder.