This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'Preferential expression of gene depending on parent of origin is called as \nSelect and explain. \nA. Genomic imprinting, B. Mosaicism, C. Chimerism, D. Cloning', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) Genomic imprintingRef: Robbin's 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* Albright's hereditary osteodystrophy: mutation in Gs alpha subunit leading to short stature, brachydactyl and PTH resistance only when mutation is inherited from the mother.", 'role': 'assistant'}]