system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The process underflying differences in expression of a gene, according to which parent has transmitted, is called
assistant
The correct answer is  Genomic imprinting is an epigenetic phenomenon that causes genes to be expressed in a parent-of-origin-specific manner. Reference: GHAI Essential pediatrics, 8th edition