Under normal circumstances, genes in this region are inactive, or silenced, on maternal chromosome 15 but active on paternal chromosome 15. (sciencedaily.com)
Such an allelic chromatin organization might be present at other DMRs as well, and a recent study by Schweizer et al. (2) shows that the imprinting - control region in the 5 % portion of the SNRPN gene has strong hypersensitive sites on the unmethylated maternal chromosome only. (geneimprint.com)
Scientists already knew that recombination shuffles the contents of maternal chromosomes 60 % more than the contents of paternal chromosomes. (sciencemag.org)