In a small subset of mammalian genes, on the list of two inherited copies (alleles) is switched off. Which allele is matter to “genomic imprinting” is depending on regardless of whether it had been inherited in the mother or the father. Genomic imprinting can be a developmentally decided epigenetic method https://concretedrivewaystamps44059.spintheblog.com/29620559/everything-about-pattern-imprint