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SDINIC89 SDINIC89
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6 years ago
In a genetic cross between two bacteriophage T4 rII mutants, r+ recombinants are produced. The genetic changes in these two rII mutants must be
 
  A) heterozygous.
  B) heteroallelic.
  C) homozygous.
  D) homoallelic.
  E) polymorphic.
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6 years ago
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