<prompt> True of autosomal dominant polycystic kidney disease I and II respectiely -Chromosomes 16 and 516 and 411 and 511 and 4  <response>: Answer is b i.e. 16 and 4 Three forms of ADPKD have been identified. ADPKD-1 - accounts for 85 of cases - its gene is found on chromosome 16p ADPKD-2 - its gene has been mapped to chromosome 4q - it appears to have a later age of onset of symptoms and renal failure than ADPKD-1 ADPKD-3 - it has not been mapped to a gene uptill now. 