Crossing over in diploid organisms is responsible for

Options

A. dominance of genes
B. linkage between genes
C. segregation of alleles
D. recombination of alleles.

Explanation

**Step-by-Step Solution:**

1. **Understanding Crossing Over:**
- Crossing over is a biological process that occurs during meiosis, specifically during prophase I. It involves the exchange of genetic material between non-sister chromatids of homologous chromosomes.

2. **Identifying the Process:**
- During crossing over, segments of DNA are swapped between two homologous chromosomes. This exchange occurs at points called chiasmata, where the chromatids physically overlap.

3. **Result of Crossing Over:**
- The primary outcome of crossing over is the recombination of genetic material. This means that the alleles (different versions of a gene) on the chromosomes are shuffled, creating new combinations of alleles.

4. **Importance of Recombination:**
- Recombination increases genetic diversity within a population. It is crucial for evolution and adaptation, as it allows for new traits to emerge.

5. **Conclusion:**
- Therefore, crossing over in diploid organisms is responsible for the recombination of alleles. This process is essential for generating genetic variation.

**Final Answer:**
Crossing over in diploid organisms is responsible for the recombination of alleles.

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