Select the odd one out w.r.t non-allellic gene interactions
(a) Epistasis
(b) Duplicate genes
(c) Incomplete dominance
(d) Complementary genes

Options

A. Epistasis
B. Duplicate genes
C. Incomplete dominance
D. Complementary genes

Answer

To solve the question of selecting the odd one out with respect to non-allelic gene interactions, we will analyze each option provided:

### Step 1: Understand Non-Allelic Gene Interactions
Non-allelic gene interactions refer to the interactions between genes that are not alleles of the same gene. These interactions can influence the phenotype in various ways. Common types of non-allelic gene interactions include epistasis, duplicate genes, and complementary genes.

### Step 2: Analyze Each Option
- **(a) Epistasis**: This is a type of non-allelic interaction where the effect of one gene masks the effect of another gene. For example, in certain genetic crosses, one gene can suppress the expression of another gene.

- **(b) Duplicate Genes**: These are genes that perform the same function. They can interact with each other in a way that can enhance or modify the expression of a trait, which is also a form of non-allelic interaction.

- **(c) Incomplete Dominance**: This is a genetic phenomenon where the phenotype of heterozygotes is intermediate between those of the two homozygotes. This interaction is based on alleles of the same gene, not different genes, making it a form of allelic interaction rather than non-allelic.

- **(d) Complementary Genes**: These are genes that work together to produce a certain phenotype. The interaction between complementary genes is also a type of non-allelic gene interaction.

### Step 3: Identify the Odd One Out
From the analysis:
- Options (a), (b), and (d) are all examples of non-allelic gene interactions.
- Option (c) Incomplete Dominance is not a non-allelic interaction; it is an interaction between alleles of the same gene.

### Conclusion
The odd one out with respect to non-allelic gene interactions is **(c) Incomplete Dominance**.

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