GJB2 and sensorineural hearing loss disorder: Alternatively, SNHL of SH60-136 may result from autosomal recessive mutations in the same gene with SH60-142 (mother of SH60-136) if SNHL of SH60-142 was because of autosomal recessive mutations in a certain deafness gene other than GJB2 and if the father (SH60-141) is a carrier of a mutation in the gene.