The phenomenon where a single gene mutation affects multiple traits is:

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Pleiotropy is when one gene influences several distinct phenotypic characteristics. Example: sickle cell disease (mutant hemoglobin affects RBC shape, causing anemia, pain, organ damage). Polygenic traits involve many genes, codominance both alleles expressed, epistasis gene interaction.

The phenomenon where a single gene mutation affects multiple traits is: MCQ with Answer and Explanation

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