The duplication (chr11:111782129-112202448 (GRCm39)) allele was created through targeting with sgRNAs (targeting CACCGTGCTGAAGTTGAACGATGCG and CACCGTTAGAAATCCTTGTCCCAAC) using CRISPR/Cas9 technology. It duplicates the central section of the Sox9 topologically associated domain (TAD) but not the gene itself. (J:235642)