Genetic disorder haemophilia is characterized by excessive loss of blood which of the following statements is not true in relation to this disorder

Options

A. It is lethal disease
B. Factor VIII or IX may be absent
C. It is X linked disease
D. It is autosomal disease.

Answer

To solve the question regarding the genetic disorder hemophilia and identify which statement is not true, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Hemophilia**:
- Hemophilia is a genetic disorder characterized by the inability of the blood to clot properly, leading to excessive bleeding.

2. **Identify the Type of Inheritance**:
- Hemophilia is a sex-linked recessive disorder, primarily associated with the X chromosome. This means that the gene responsible for hemophilia is located on the X chromosome.

3. **Types of Hemophilia**:
- There are two main types of hemophilia:
- Hemophilia A: Caused by a deficiency of clotting factor VIII.
- Hemophilia B: Caused by a deficiency of clotting factor IX.

4. **Evaluate the Statements**:
- Now, we need to evaluate the statements provided in the question to identify which one is not true:
- **Statement 1**: It is a lethal disease. (True)
- **Statement 2**: Factor 8 or 9 may be absent. (True)
- **Statement 3**: It is an X-linked disease. (True)
- **Statement 4**: It is an autosomal disease. (Not True)

5. **Conclusion**:
- The statement that is not true in relation to hemophilia is that it is an autosomal disease. Hemophilia is indeed a sex-linked disorder, specifically linked to the X chromosome.

### Final Answer:
The statement that is not true in relation to hemophilia is: "It is an autosomal disease."

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