This cluster of papers explores the phenomenon of genomic imprinting, where certain genes are expressed in a parent-of-origin-specific manner. It covers topics such as parental influence on gene expression, epigenetic regulation through DNA methylation, and the role of imprinted genes in syndromes like Prader-Willi and Angelman. Additionally, it delves into the mechanisms of imprint control regions and the involvement of non-coding RNA in regulating imprinted gene networks.