अनुषंगी ( सैटेलाइट )DNA महत्वपूर्ण होता है , क्योंकि वह -

Options

A. Code for enzyme needed for DNA replication
B. Codes for proteins needed in cell cycle
C. Shows high degree of polymorphism in population and also the same degree of polymorphism in a individual , which is heritable from parents to children.
D. Does not codes for proteins and is same in all membres of the population .

Answer

### Step-by-Step Solution:

1. **Understanding Satellite DNA**:
- Satellite DNA, also known as anushangi DNA, consists of repetitive sequences that do not code for proteins. It is found in the genomes of many organisms and is located in specific regions of chromosomes.

2. **Analyzing the Options**:
- **Option 1**: "Codes for enzyme needed for DNA replication."
- This is incorrect because satellite DNA does not code for any enzymes involved in DNA replication, such as DNA helicase or DNA polymerase.

- **Option 2**: "Codes for protein needed in cell cycle."
- This is also incorrect as satellite DNA does not encode proteins necessary for the cell cycle or any other cellular processes.

- **Option 3**: "Shows high degree of polymorphism in population and also the same degree of polymorphism in an individual which is heritable from parents to children."
- This is correct. Satellite DNA exhibits a high degree of polymorphism, meaning there are variations in the DNA sequences among individuals in a population. This polymorphism is heritable, making it useful for genetic studies, including paternity testing and DNA fingerprinting.

- **Option 4**: "Does not code for protein and is the same in all members of the population."
- This is incorrect because while satellite DNA does not code for proteins, it is not the same in all members of the population; it varies, which is what makes it useful for genetic identification.

3. **Conclusion**:
- Based on the analysis of the options, the correct answer is **Option 3**: Satellite DNA is important because it shows a high degree of polymorphism in the population and is heritable from parents to children.