1. A method for determining a relationship between biological predictors and a phenotype, the method implemented at least in part by a computer, the method comprising: obtaining data regarding a set of biological predictors, the set of biological predictors including a first portion comprising labeled training wherein biological predictors in the first portion have labels to indicate corresponding phenotypes, the set of biological predictors including a second portion; obtaining an indication of the phenotype; training a probabilistic predictor using the labeled training data to predict the phenotype based on the set of biological predictors, the probabilistic predictor comprising a statistical model of the set of biological predictors that, given input biological predictors and input phenotypes, computes predictive probabilities of the input biological predictors in relation to the input phenotypes; applying the trained probabilistic predictor to the second portion of the data to compute predictive probabilities of the phenotype for the second portion of the data, the predictive probabilities comprising probabilities that the biological predictors in the second portion are predictive of the phenotype; and using statistical significance between an aspect of the predictive probabilities and actual phenotype observations to summarize the relationship between the set of biological predictors and the phenotype.