Effect of Tryptophan hydroxylase 2 polymorphism on chimpanzee personality trait: Linear regression analysis with sex and age as the covariates.

Note.†MAF: minor allele frequency.*The combined samples includes 26 subjects from Chimpanzee Sanctuary Uto, 21 subjects from Guinea, and a total of 10 subjects from the Kyoto University Primate Research Institute (n = 5), Higashiyama Zoo (n = 2), Itouzu-no-mori Zoo (n = 1), Kouchi Zoo (n = 1), and Tama Zoo (n = 1). Boldfaced values indicate statistically significant effects (pp