Figure 1From: A male pheromone-mediated trade-off between female preferences for genetic compatibility and sexual attractiveness in rats Duration of investigation (mean ± SE) by BB (A, N = 12) and LL (B, N = 13) female rats in binary choice tests (* P < 0.05, ** P < 0.01, paired t -test or Wilcoxon signed-rank test). Back to article page