Which of the following will not cause variations among siblings?

Options

A. Independent assortment of genes
B. Crossing over
C. Linkage
D. Mutation

Answer

To solve the question "Which of the following will not cause variations among siblings?", we will analyze the given options and understand the concepts related to genetic variations.

### Step-by-Step Solution:

1. **Understanding Genetic Variation**: Genetic variation refers to differences in the genetic makeup of individuals within a population. These variations can arise due to several processes during reproduction.

2. **Identifying the Options**: The options provided are:
- A) Independent assortment of genes
- B) Crossing over
- C) Linkage
- D) Mutation

3. **Analyzing Each Option**:
- **Independent Assortment of Genes**: This is a process during meiosis where different genes independently separate from one another when reproductive cells develop. This leads to genetic variation among siblings.
- **Crossing Over**: This occurs during meiosis when homologous chromosomes exchange segments of DNA. This process increases genetic diversity and leads to variations among siblings.
- **Linkage**: This refers to genes that are located close to each other on the same chromosome and tend to be inherited together. Linked genes do not assort independently, which means they do not contribute to variations among siblings.
- **Mutation**: This is a change in the DNA sequence that can introduce new genetic variations. Mutations can lead to differences among siblings.

4. **Conclusion**: Based on the analysis, the process that will not cause variations among siblings is **Linkage** (Option C). This is because linked genes are inherited together and do not contribute to genetic diversity.

### Final Answer:
The correct answer is **C) Linkage**.