1. An allele of a gene that confers musical ability is identified in a family. All 5 children received this allele from their father and are confirmed heterozygotes. 2 children play the piano relatively well, 2 play the piano and guitar well, and 1 child is a piano, flute, and clarinet virtuoso. Based only on the information given, which of the following genetic phenomena best describes this trait? (lpoint) a. anticipation b. incomplete dominance c. incomplete penetrance d. overdominance e. variable expressivity .