Preferential expression of same gene depending on parent of origin is referred to as:
Genomic imprinting Phenomenon that leads to preferential expression of an allele depending on its, parental origin. Eg : Beckwith Wiedemann syndrome (have two paternal but no maternal copies of chromosome 11). Albright's hereditary osteodystrophy (sho stature, brachydactyly and PTH resistance).
Genomic imprinting
Mosaicism
Anticipation
Non-penetrance
Genetics