Copyright © American Speech-Language-Hearing Association From: Connexin 26 as a Cause of Hereditary Hearing Loss Am J Audiol. 1999;8(2):93-100. doi:10.1044/1059-0889(1999/016) Legend: Allele-specific polymerase chain reaction assay for detection of the 35delG mutation. Homozygous individuals have two mutant alleles and no normal alleles. Heterozygous individuals have a mutant and normal allele. Absence of a control band (?) requires the assay to be repeated. Date of download: 10/26/2017 Copyright © American Speech-Language-Hearing Association