highly significantP < 0.001
Analysis of paternity patterns in relation to +/ t genotype Overall, 33.8% of pups of +/ t females were sired by +/ t males, compared to 63.8% of pups of +/+ females ( Table 1 ), a highly significant difference (Pearson's χ 2 = 11.83, df = 1, P < 0.001).