<prompt> Hereditary retinoblastomas develop the following chromosomal deletion -13q1413p1414pI314p13  <response>: Ans. is a i.e., 13q14 Deletion of a small number of tightly clustered genes result in a number of genetic disorders termed as microdeletion syndromes. Wilms tumor - Aniridia complex WAGR syndrome Retinoblastoma Prader - Willi,syndrome Angelman syndrome DiGeorges syndrome Velo-Cardiofacial syndrome llp 13 Pa of deletion of sho arm of chromosome 11 13q 14.11 deletion of pa of long arm of chromosome 13 15q 11-13 deletion of pa of long arm of chromosome 15 22q11deletion of pa of long arm of chromosome 22 o Deletions involving the long arm of chromosome 22 22q 1 I are the most common microdeletions identified to data. o Velo-cardiofacial syndrome, is the most commonly associated syndrome. 