Distance between the genes and percentage of recombination shows

Options

A. a direct relationship.
B. an inverse relationship.
C. a parallel relationship.
D. no relationship.

Explanation

**Step-by-Step Solution:**

1. **Understanding Genes and Recombination:**
- Genes are segments of DNA that code for proteins and traits. When two genes are located on the same chromosome, they can be inherited together unless separated by a process called recombination or crossing over during meiosis.

2. **Explaining Recombination:**
- Recombination occurs when homologous chromosomes exchange segments of genetic material. This process can result in new combinations of alleles, leading to genetic diversity.

3. **Distance Between Genes:**
- The physical distance between two genes on a chromosome can influence the likelihood of recombination occurring between them. The farther apart two genes are, the more likely it is that a crossover event will occur between them.

4. **Percentage of Recombination:**
- The percentage of recombination is a measure of how often recombination occurs between two genes. It is expressed as a percentage of offspring that show a recombinant phenotype compared to the total number of offspring.

5. **Relationship Between Distance and Recombination:**
- There is a direct relationship between the distance between genes and the percentage of recombination. As the distance increases, the percentage of recombination also increases. This means that genes that are farther apart are more likely to be separated during recombination.

6. **Conclusion:**
- Therefore, the correct answer to the question is that the distance between the genes and the percentage of recombination shows a direct relationship.

**Final Answer:**
- The distance between the genes and the percentage of recombination shows a **direct relationship** (Option A).

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