Genes showing multiple effects are

Options

A. Complementary gene
B. Pseudogenes
C. Pleiotropic genes
D. Cistrons

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the type of genes that exhibit multiple effects. This means we are looking for a specific category of genes that can influence more than one trait or phenotype.

2. **Analyzing the Options**:
- **Option A: Complementary Genes**: These are genes that interact at the same locus to produce a dominant phenotype. They do not exhibit multiple effects on different traits, so this option is incorrect.
- **Option B: Pseudogenes**: These are sequences that resemble functional genes but are non-functional. They do not have multiple effects as they do not produce any phenotype, making this option also incorrect.
- **Option C: Pleiotropic Genes**: These genes are known for their ability to affect multiple phenotypic traits. The phenomenon where one gene influences multiple traits is referred to as pleiotropy. This option is correct.
- **Option D: Cistrons**: These are functional segments of DNA that code for a single polypeptide. They do not imply multiple effects, thus this option is incorrect.

3. **Conclusion**: After analyzing all the options, the correct answer is **Option C: Pleiotropic Genes**, as they are defined by their ability to affect multiple traits.

**Final Answer**: Pleiotropic genes show multiple effects.

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