Responses to urine odor choices for Behavior Experiment 1.

Mice trained to discriminate urine odors of mice differing in both the MHC and in diet generalized this response to diet changes but not to MHC. *Diet: Diet S = Synthetic diet; Diet L = Laboratory Rodent diet. †on training trials reinforced to go to B6 Diet S over B6-H2k Diet L. ‡on training trials reinforced to go to B6-H2k Diet S over B6 Diet L. §p<0.0001, binominal test. aThe plus sign (+) refers to a choice that is correct or concordant with training whereas the minus sign (−) refers to a response that was incorrect or not concordant with training. bThe numbers in the tables represent the generalization trials only.