| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Pleiotropic gene | $(i)$ Both alleles express equally |
| $(b)$ Co-dominance | $(ii)$ Change in nucleotide |
| $(c)$ Epistasis | $(iii)$ One gene shows multiple phenotypic expression |
| $(d)$ Mutation | $(iv)$ Non-allelic gene interaction |
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