Generally the genetic markers are

Options

A. 1)Genes
B. 2)DNA polymorphs
C. 3)DNA segments that have no coding function
D. 4)All the three

Answer

To answer the question "Generally, the genetic markers are," we need to analyze the options provided and understand what genetic markers are in the context of genetics.

### Step-by-Step Solution:

1. **Understanding Genetic Markers**:
- Genetic markers are specific sequences of DNA that can be used to identify individuals or species. They are often located at known positions on chromosomes.

2. **Identifying the Options**:
- The options presented are:
1. Gene
2. DNA polymorphs (DNA segments that have no coding function)
3. A combination of the above
4. All the three

3. **Evaluating Each Option**:
- **Option 1: Gene**: This is partially correct because genes can serve as genetic markers, but they are not the only type.
- **Option 2: DNA polymorphs**: This is also correct. DNA polymorphisms, like single nucleotide polymorphisms (SNPs) and microsatellites, are common types of genetic markers.
- **Option 3: DNA segments that have no coding function**: This is correct as well. Many genetic markers do not code for proteins but can still serve as markers for genetic variation.
- **Option 4: All the three**: Since all the previous options are correct, this option is the most comprehensive.

4. **Conclusion**:
- The correct answer is **Option 4: All the three**. This option encompasses the fact that genetic markers can be genes, DNA polymorphisms, and non-coding DNA segments.

### Final Answer:
**The correct option is: All the three (Option 4).**

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