Mendelian recombinations are due to

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Mendelian Genetics**: Mendelian recombinations refer to the variations in traits that occur in offspring due to the genetic combinations inherited from their parents.

2. **Identifying the Key Concepts**: The question provides four options:
- Mutation
- Linkage
- Crossing over
- Independent assortment of characters

3. **Analyzing Each Option**:
- **Mutation**: This refers to changes in the DNA sequence, which can lead to new traits but is not the primary mechanism for recombination.
- **Linkage**: This describes how genes that are located close to each other on the same chromosome tend to be inherited together, which does not promote recombination.
- **Crossing Over**: This is the process where homologous chromosomes exchange genetic material during meiosis, leading to new combinations of alleles. While it does contribute to genetic variation, it is not the sole reason for Mendelian recombinations.
- **Independent Assortment**: This principle states that alleles for different traits segregate independently of one another during gamete formation. This was observed by Gregor Mendel in his dihybrid crosses.

4. **Conclusion**: The correct answer to the question is that Mendelian recombinations are primarily due to the **independent assortment of characters**.

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