This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic and genetic disorders, Subject name: Pediatrics
The process underflying differences in expression of a gene, according to which parent has transmitted, is called 
Select and explain. 
A. Anticipation, B. Mosiacism, C. Non-penetrance, D. Genomic imprinting
D: Genomic imprinting
Answer: D: Genomic imprinting 
Explanation: 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