 In addition, the identical twin concordance rate is 10%, whereas the dizygotic twin concordance rate is only 3%.Twelve regions of the genome may be linked to UC, including, in the order of their discovery, chromosomes 16, 12, 6, 14, 5, 19, 1, and 3, but none of these loci has been consistently shown to be at fault, suggesting that the disorder is influenced by multiple genes.For example, chromosome band 1p36 is one such region thought to be linked to inflammatory bowel disease.