Fig. 2: Schematics of gene structure for five candidate genes.

These genes [serotonin transporter (SERT), dopamine receptor D4 (DRD4), melanocortin receptors 1 and 5 (MC1R and MC5R), and oxytocin receptor (OXTR)] were used to assess the relationship between genotype and boldness and maternal performancevariation in female grey seals of Sable Island, Nova Scotia.