(B) Genome scans for gonadal fat mass using different models over mouse Chromosome 5. Scans for fat mass using all animals with (black) and without (green) sex as an additive covariate failed to detect significant linkage. Females analyzed alone (magenta) showed evidence for suggestive linkage (p < 2 × 10−4). When both sexes were analyzed to account for sex effects (red), a significant QTL was realized (p < 10−6).