The functional complex that consists of a cluster of genes including structural genes,a promoter gene,an operator gene,and a regulator gene was discovered by:

  • A
    Beadle and Tatum $(1958)$
  • B
    Watson and Crick $(1953)$
  • C
    Jacob and Monad $(1961)$
  • D
    Britten and Davidson $(1961)$

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