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: Unknown
[{'content': 'Differential expression of same gene depending on parent of origin is referred to as – \nSelect and explain. \nA. Genomic imprinting, B. Mosaicism, C. Anticipation, D. Nonpenetrance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The phenomenon referred to as genomic imprinting leads to preferential expression of an allele depending on the parental origin.\nGenomic imprinting\nHuman inherits two copies of each gene, i.e. two alleles, from homologous maternal and paternal chromosomes.\nThere is no functional difference between the genes derives from mother or the father.\nBut, with respect to some genes, there are functional differences between the paternal gene and maternal gene.\nThese differences result from an epigenetic process, called genomic imprinting.\nIn most cases, genomic imprinting selectively inactivates either the maternal or paternal allele.\nMaternal genomic imprinting :\nSelective inactivation of maternal allele.\nExample is Angelman syndrome.\nPaternal genomic imprinting :\nSelective inactivation of paternal allele.\nExample is Prader – Willi syndrome.', 'role': 'assistant'}]