Gene for diabetes mellitus is

Options

A. Autosomal dominant
B. Autosomal recessive
C. Sex linked dominant
D. Sex linked recessive

Explanation

**Step-by-Step Solution:**

1. **Understanding Diabetes Mellitus**:
- Diabetes mellitus is a metabolic disorder characterized by high blood sugar levels over a prolonged period. It has two main types: Type 1 (insulin-dependent) and Type 2 (insulin-independent).

2. **Identifying the Genetic Basis**:
- The inheritance patterns of diabetes mellitus are complex. Research indicates that the genes associated with diabetes mellitus can exhibit different inheritance patterns.

3. **Inheritance Patterns**:
- The options provided are:
- Autosomal dominant
- Autosomal recessive
- Sex-linked dominant
- Sex-linked recessive

4. **Analyzing Type 1 and Type 2 Diabetes**:
- Type 1 diabetes is often considered to have an autoimmune component and is less straightforward in terms of inheritance.
- Type 2 diabetes, on the other hand, is more commonly associated with genetic factors and environmental influences.

5. **Determining the Correct Inheritance Pattern**:
- Studies suggest that the gene associated with diabetes mellitus primarily follows an **autosomal dominant** inheritance pattern. This means that only one copy of the mutated gene is sufficient to increase the risk of developing the disease.

6. **Considering Incomplete Penetrance**:
- It is important to note that the gene for diabetes mellitus shows **incomplete penetrance**. This means that not all individuals carrying the gene will express the condition, highlighting the role of other factors such as environment and lifestyle.

7. **Final Conclusion**:
- Based on the analysis, the gene for diabetes mellitus is classified as **autosomal dominant**.

**Final Answer**: The gene for diabetes mellitus is autosomal dominant.

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