R help - Feb 2012 - best R command to assess SNP-covariates logistic regression

Good morning


In case control study
I do have 35 covariates (personal and environmental details about the
patients)
and genotype data for 500000 SNPs

I need to apply all the covariates and one SNP at a time in the logistic
regression model

How can i do this in R ?

I have the Covariate file and genotype file as separate files

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