Nephritis is due to

Options

A. Y-linked inheritance
B. X-linked inheritacne
C. XY-linked inheritance
D. Autosomal gene inheritance

Answer

### Step-by-Step Solution

1. **Understanding Nephritis**: Nephritis is an inflammation of the kidneys, which can be caused by various factors including infections, toxins, and autoimmune disorders.

2. **Identifying Causes**: The most common causes of nephritis are autoimmune disorders that affect major organs, particularly the kidneys.

3. **Analyzing Genetic Inheritance**: The question presents four options regarding the genetic basis of nephritis:
- Y-linked inheritance
- X-linked inheritance
- XY-linked inheritance
- Autosomal gene inheritance

4. **Evaluating Each Option**:
- **Y-linked inheritance**: This type of inheritance involves genes located on the Y chromosome and is not associated with nephritis.
- **X-linked inheritance**: This involves genes located on the X chromosome. While some conditions are X-linked, nephritis is not primarily caused by X-linked inheritance.
- **XY-linked inheritance**: This refers to genes that are present on both X and Y chromosomes and can undergo crossing over. This is the correct option for nephritis as it indicates that the genes involved are incompletely linked between the X and Y chromosomes.
- **Autosomal gene inheritance**: This involves genes located on non-sex chromosomes (autosomes) and does not apply to nephritis.

5. **Conclusion**: Based on the analysis, the correct answer to the question "Nephritis is due to" is **XY-linked inheritance**.

### Final Answer
Nephritis is due to **XY-linked inheritance**.

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