A linear graphic representation of the sequence and relative distances of the various genes present in a chromosome is

Options

A. linkage map or chromosomal map
B. genetic map or linkage map
C. chromosomal map or genetic map
D. chromosomal map or genetic map or linkage map

Answer

To solve the question about the linear graphic representation of the sequence and relative distances of various genes present in a chromosome, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a specific term that describes a linear graphic representation of genes on a chromosome.

2. **Identifying Key Terms**: The key terms in the question are "linear graphic representation," "sequence," "relative distances," and "genes present in a chromosome."

3. **Exploring the Options**: The options provided are:
- Linkage map or chromosomal map
- Genetic map or linkage map
- Chromosomal map or genetic map
- Chromosomal map or genetic map or linkage map

4. **Defining the Terms**:
- **Chromosomal Map**: A representation that shows the arrangement of genes on a chromosome.
- **Genetic Map**: Similar to a chromosomal map, it shows the relative positions of genes based on recombination frequency.
- **Linkage Map**: A type of genetic map that specifically shows the order of genes and the relative distances between them based on linkage analysis.

5. **Analyzing the Correct Answer**: All three terms (chromosomal map, genetic map, and linkage map) refer to the graphical representation of genes on a chromosome. They illustrate the sequence and relative distances of genes, making them synonymous in this context.

6. **Conclusion**: Since all three terms are correct in describing the linear graphic representation of the sequence and relative distances of various genes present in a chromosome, the correct answer is "chromosomal map or genetic map or linkage map."

### Final Answer:
The correct answer is: **Chromosomal map or genetic map or linkage map.**