There were no notable differences in the startle response to the prepulse or pulse only between heterozygotes of CenG1A (CenG1A/+) and FXS larvae with genetically reduced expression of CenG1A (CenG1A/+; fmr1) (Fig. 4A, prepulse only, CenG1A/+: 11.5%±2.1%, n=10, CenG1A/+; fmr1, 11.6%±2.0%, n=10; pulse only, CenG1A/+: 85.0%±3.2%, n=20, CenG1A/+; fmr1: 82%±3.0%, n=25). Here, FMR1 is linked to fragile X syndrome.