Fig. 5.

Behavioral analysis using contextual and cued fear conditioning. Df(10)1Yey/+ mice (n=16) (a, b) and Df(17)1Yey/+ mice (n=15) (c, d) as well as their wild-type littermates with equal sample sizes were examined as described in Materials and Methods. (a, c) The percentage of time spent freezing before the foot-shock (baseline) as well as during the 24- and 72-hr contextual tests is shown. (b, d) The percentage of time spent freezing in the altered chamber before the auditory tone cue was delivered (baseline) as well as during the cue delivery is shown.