Epistasis: Gene Interactions Explained | Dominant & Recessive Epistasis | Grade 11 | FBISE 2024

Epistasis
Learn about Epistasis, the interaction between genes that affect a single trait. Understand dominant and recessive epistasis, and explore examples and applications in genetics and evolutionary biology.
Epistasis refers to the interaction between two or more genes that affect a single trait or phenotype. It occurs when the expression of one gene is influenced by the presence or absence of another gene.
Types of Epistasis:
1. Dominant Epistasis: One gene masks the effect of another gene.
2. Recessive Epistasis: One gene enhances the effect of another gene.
Dominant Epistasis:
1. One gene (dominant) masks the effect of another gene (recessive).
2. Example: Coat color in mice (B/b and C/c genes).
3. BB or Bb genotype masks the effect of C/c genotype.
Recessive Epistasis:
1. One gene (recessive) enhances the effect of another gene.
2. Example: Eye color in Drosophila (w and rd genes).
3. ww genotype enhances the effect of rd/rd genotype.
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[@ambreenmasood6094]

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[@arshadsarwar135]

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