This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Genomic imprinting is associated with- 
Select and explain. 
A. Silencing of paternal chromosome, B. Silencing of maternal chgromosome, C. Angelman syndroma, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Silencing of paternal chromosome; 'b' i.e., Silencing of maternal chromosome; `c' i.e., Angelman syndroma Prader Willi Syndrome Deletion occurs exclusively on paternal chromosome 15 (deletion of band q 12 in long arm of chromosome 15) Features : Diminished fetal activity Hypotonia Obesity Mental retardation Sho stature Hypogonadotropic hypogonadism