Complex sentence: Mutations in the SLC26A2 gene cause diastrophic dysplasia, and it is one of a spectrum of skeletal disorders caused by mutations in the SLC26A2 gene.
Split into simpler sentences: Mutations in the SLC26A2 gene cause diastrophic dysplasia. Diastrophic dysplasia is one of a spectrum of skeletal disorders caused by mutations in the SLC26A2 gene.