Select the correct statement.

Options

A. Tightly linked genes on the same chormosomes show higher recombination .
B. Genes far apart on the same chromosome show very very few recombination
C. Genes loosely linked on the same chormosomes show similar recombination as the tightly linked ones .
D. Tightly linked genes on the same chromosome show very few recombination

Answer

To solve the question, we need to analyze each of the provided statements about gene linkage and recombination.

1. **Understanding Gene Linkage**:
- Genes that are located close to each other on the same chromosome are said to be "tightly linked."
- Tightly linked genes tend to be inherited together and show lower rates of recombination because they are less likely to be separated during meiosis.

2. **Evaluating Each Option**:
- **Option A**: "Tightly linked genes on the same chromosome show higher recombination."
- This statement is incorrect. Tightly linked genes show lower recombination rates.

- **Option B**: "Genes far apart on the same chromosome show very, very few recombination."
- This statement is also incorrect. Genes that are far apart can show higher recombination frequencies because they are more likely to be separated during meiosis.

- **Option C**: "Genes loosely linked on the same chromosome show similar recombination as the tightly linked one."
- This statement is incorrect. Loosely linked genes show a different recombination frequency compared to tightly linked genes; generally, loosely linked genes have a higher recombination frequency.

- **Option D**: "Tightly linked genes on the same chromosome show very few recombination."
- This statement is correct. Tightly linked genes have a low frequency of recombination.

3. **Conclusion**:
- The correct answer is **Option D**: "Tightly linked genes on the same chromosome show very few recombination."