<prompt> Preferential expression of gene depending on parent of origin is called asGenomic imprintingMosaicismChimerismCloning  <response>: Ans. a Genomic imprintingRef: Robbins pathology 9th ed. 172-173Preferential expression of an allele depending on parental origin is genomic imprinting. Praderwili syndrome: Deletion of paternal chromosome 15 Angelman syndrome:Deletion of maternal chromosome 15 Beckwith weidmann syndrome: have two paternal but no maternal copies of chromosome 11 Albrights hereditary osteodystrophy: mutation in Gs alpha subunit leading to short stature, brachydactyl and PTH resistance only when mutation is inherited from the mother. 