SCGB3A1 and Allergy: However, the presence of asthma and allergies in the control group may reflect multifactorial genetic and environmental etiologies for those disorders.32, 33 We also found that the Ugrp2 (c.201delC) CdelC and (IVS1-89T>G) TG genotypes were the most common in children with allergic-AH and asthmatic-AH.