Preferential expression of same gene depending on parent of origin is referred to as:: (A) Genomic imprinting, (B) Mosaicism, (C) Anticipation, (D) Non-penetrance
Answer is A. 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).