Polygenes show

Options

A. Different phenotypes
B. Different genotype
C. Both of the above
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Polygenes:**
- Polygenes are genes that contribute to a single trait and are involved in polygenic or quantitative inheritance. This means that multiple genes influence the expression of a particular phenotype.

2. **Defining Polygenic Inheritance:**
- Polygenic inheritance is characterized by the involvement of two or more genes in the determination of a trait. This results in a continuous range of phenotypes rather than discrete categories.

3. **Role of Dominant Alleles:**
- In polygenic inheritance, the dominant alleles of these genes have a cumulative effect. Each dominant allele contributes to a part of the functional polypeptide that ultimately determines the phenotype.

4. **Expression of Traits:**
- The full expression of a trait occurs only when all the dominant alleles are present. If some dominant alleles are missing, the phenotype may be incomplete or vary.

5. **Phenotype vs. Genotype:**
- In polygenic inheritance, it is the phenotype (the observable traits) that varies significantly among individuals, while the underlying genotypes (the genetic makeup) may not show as much variation.

6. **Conclusion:**
- Based on the understanding of polygenes and polygenic inheritance, the correct answer to the question "Polygenes show" is that they show different phenotypes.

**Final Answer:**
Polygenes show different phenotypes.

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