Other genes, which are not necessarily associated with lethality, may affect animals with vision alterations (PRPF3, ADAMTSL4 in the MTRDHH3 region, and KIF3B in the MTRDHH5 region), neurological disorders (PRUNE1, POGZ in the MTRDHH3, and ASXL1, PIGU, AHCY in the MTRDHH5 region), or morphological/stature defects (ITGA10, POLR3GL, ECM1 in the MTRDHH2 region, RXFP2 in the MTRDHH4 region, and DNMT3B, CEP250, ASIP in the MTRDHH5 region). The gene discussed is RXFP2; the disease is nervous system disorder.