<unk>  is an epigenetic phenomenon that causes genes to be expressed or not, depending on whether they are inherited from the mother or the father. Genes can also be partially imprinted. Partial<unk>  occurs when alleles from both parents are differently expressed rather than complete expression and complete suppression of one parent's allele. Forms of<unk>  have been demonstrated in fungi, plants and animals. In 2014, there were about 150 imprinted genes known in mice and about half that in humans. As of 2019, 260 imprinted genes have been reported in mice and 228 in humans.<unk>  is an inheritance process independent of the classical Mendelian inheritance. It is an epigenetic process that involves DNA methylation and histone methylation without altering the genetic sequence. These epigenetic marks are established ("imprinted") in the germline (sperm or egg cells) of the parents and are maintained through mitotic cell divisions in the somatic cells of an organism. Appropriate<unk>  of certain genes is important for normal development. Human diseases involving<unk>  include Angelman syndrome, Prader–Willi syndrome and male infertility.
Genomic imprinting
Structural inheritance
Uniparental disomy
Sex-chromosome dosage compensation
Germline mosaicism
Caudal duplication
Sex selection
Nuclear sexing