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OJEE Pleiotropy — practice questions

Explore 1 free Pleiotropy questions in OJEE Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Pleiotropy questions and exercises with answers

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**Pleiotropy** is best described as:Read the answer and worked solution →

Worked practice questions

**Pleiotropy** is best described as:

  1. Two genes controlling one trait
  2. One gene controlling two or more different traits
  3. Two pairs of contrasting alleles
  4. Multiple alleles at a single locus
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Correct answer: B. One gene controlling two or more different traits

A pleiotropic gene controls multiple, apparently unrelated traits. Sickle-cell anaemia is a classic example — the Hb^s allele causes anaemia, organ damage, AND confers malaria resistance. Multiple alleles is a distinct concept (different versions of one gene).

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