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Question

Alleles which show independent effect are called ____________.

A
Supplementary alleles
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B
Codominant alleles
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C
Epistatic alleles
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D
Complementary alleles
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Solution

The correct option is B Codominant alleles

  • Codominant alleles are the alleles that show the independent effect and both the alleles are expressed equally in the phenotype of the organism e.g., blood grouping (AB blood group).
  • Complementary genes are non-allelic genes that independently show a similar effect but produce a new trait when they are present together in the dominant form.
  • Supplementary genes are a pair of non-allelic genes that produce their effect independently in the dominant state while the dominant allele of the second gene (supplemen­tary gene) needs the presence of another gene for its expression.
  • Epistasis can occur when a recessive genotype masks the actions of another gene.
Thus, the correct answer is option B.


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