In shorthorn cattle,genes for red $(R_1)$ and white $(R_2)$ coat colour occur. Crosses between red $(R_1R_1)$ and white $(R_2R_2)$ produced $(R_1R_2)$ roan. This is an example of

  • A
    Complementary genes
  • B
    Epistasis
  • C
    Codominance
  • D
    Incomplete dominance

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