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Variance explained by each chromosome for neuroticism (a) and extraversion (b). Notes: equation corresponding to the linear regression line for neuroticism: y=8E-06x +0.0017 and extraversion: y=4E-05x +0.0011, where y is the variance explained by each of the chromosomes and x is the total length of the chromosome in mega bases (Mb); R2 corresponding to the regression equation for neuroticism: 0.0202 (P=0.460) and extraversion: 0.203 (P=0.035).
