Question:
Which of the following is involved in epistasis?
Which of the following is involved in epistasis?
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Remember: "Epi-" means upon or over, indicating a hierarchical masking effect of one gene over another gene at a different locus (intergenic).
This is distinct from dominance, which represents the interaction of alleles of the same gene (intragenic).
This is distinct from dominance, which represents the interaction of alleles of the same gene (intragenic).
Updated On: Jul 8, 2026
- Intragenic interaction
- Interallelic interaction
- Intergenic interaction
- Gene conversion
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Epistasis is a genetic phenomenon where the effect of one gene locus is masked or modified by the expression of one or more other gene loci.
Step 3: Detailed Explanation:
Genetic interactions can be categorized into two main types:
1. Intragenic (or allelic) interactions: Interactions occurring between alleles of the same gene locus (e.g., dominance, co-dominance, incomplete dominance).
2. Intergenic (or non-allelic) interactions: Interactions occurring between genes located at different loci on the chromosomes.
Since epistasis involves a gene at one locus masking or modifying the phenotypic expression of another gene at a different locus, it is classified as an intergenic interaction.
Step 4: Final Answer
The correct option is (C).
Epistasis is a genetic phenomenon where the effect of one gene locus is masked or modified by the expression of one or more other gene loci.
Step 3: Detailed Explanation:
Genetic interactions can be categorized into two main types:
1. Intragenic (or allelic) interactions: Interactions occurring between alleles of the same gene locus (e.g., dominance, co-dominance, incomplete dominance).
2. Intergenic (or non-allelic) interactions: Interactions occurring between genes located at different loci on the chromosomes.
Since epistasis involves a gene at one locus masking or modifying the phenotypic expression of another gene at a different locus, it is classified as an intergenic interaction.
Step 4: Final Answer
The correct option is (C).
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