what is the r2 of the gene and the covariate how does a gene explain variation in the model which type of covariate is the effect a gene has on blood sugar how to test the effect of a gene on a covariate how to find the amount of variation explained by a gene? how does a gene explain variation how to check if a gene is causing cardiovascular disease how does a gene affect variation why is variation influenced by genes and covariates what variable is used when a gene is used alone in a model? what model can explain variation in the gene does a gene cause variability in a nagelkerke model? how does an interaction term determine whether the effect of a gene or a covariate is true what is the r2 of a gene how does a gene cause variation can a covariate explain variation which covariate in a genetics model can explain variation which is true about the amount of variation in a gene is the effect of the gene on blood glucose a covariate? how does the effect of a gene on blood sugar vary