UPSC Prelims 2002·GS1·science-and-technology·ipr and biotechnology

When one gene control two or more different characters simultaneously, the phenomenon is called

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Last updated 8 Jul 2026, 4:39 pm IST
  1. AApomixis
  2. BPleiotropyCorrect
  3. CPolyploidy
  4. DPolytony

Explanation

Pleiotropy is the correct answer because it describes the genetic phenomenon where a single gene influences multiple, seemingly unrelated phenotypic traits or characters. A classic example in humans is sickle cell anemia, where a mutation in one gene affects red blood cell shape, blood flow, and various organ functions simultaneously.

As for the other options: Apomixis refers to asexual seed formation without fertilization. Polyploidy is a condition where an organism has more than two complete sets of chromosomes. Polytony is a musical or linguistic term and is not a standard genetic phenomenon related to gene control of characters.

science-and-technology: When one gene control two or more different characters simultaneously, the phenomenon is called
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