Match List I with List II List I (Gene interaction) List II...

Holandric genes are genes located on the Y chromosome and are transmitted directly from father to son. Hypertrichosis (excessive hair on the ear pinna) is a classic example of a holandric trait. Thus, (A) matches with (II).

Pleiotropy is the phenomenon where a single gene exhibits multiple phenotypic expressions or effects. Thus, (B) matches with (I).

Multiple alleles refer to the existence of more than two alternative forms of a gene in a population. The ABO blood group system in humans is a well-known example, governed by three alleles (I^A$,$I^B$, and$i$). Thus, (C) matches with (III).<br><br>The correct matching is (A) - (II), (B) - (I), (C) - (III).<br><br>Answer: (A) - (II), (B) - (I), (C) - (III)$