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. 2013 Jan 21;23(2):168–171. doi: 10.1016/j.cub.2012.11.058

Figure 1.

Figure 1

Relative Brain Size Responds Rapidly to Divergent Selection

F0 is the parental generation; F1 and F2 are the first and second brain weight-selected generation, respectively. Depending on replicate, second-generation large- and small-brained females (left panel) differ by 8.0%–9.3% (p < 0.001) in relative brain size, while second-generation large- and small-brained males (right panel) differ by 5.0%–8.3% (p < 0.001). Depicted are the mean and SE values for residuals of brain weight regressed on body size within each generation and replicate. See also Figure S1 for experimental procedures and plots of raw data, and Table S1 for detailed results.