Which genetic disorder presented in Queen victoria's family :-

Options

A. Colour blindness
B. Haemophilia
C. Cystis fibrosis
D. Thalassemia

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about the genetic disorder present in Queen Victoria's family.

2. **List the Options**: The options provided are:
- A) Colorblindness
- B) Hemophilia
- C) Cystic fibrosis
- D) Thalassemia

3. **Evaluate Each Option**:
- **Colorblindness**: This is a sex-linked recessive disorder affecting the ability to distinguish colors, particularly red and green. It is noted that colorblindness was not present in Queen Victoria's family, making this option incorrect.

- **Hemophilia**: This is a sex-linked recessive disorder characterized by the inability to properly form blood clots, leading to excessive bleeding. The pedigree of Queen Victoria shows several descendants with hemophilia, indicating that this was indeed present in her family. Therefore, this option is likely correct.

- **Cystic Fibrosis**: This is an autosomal recessive disorder that affects the lungs and digestive system, caused by mutations in the CFTR gene. Since it is not sex-linked and was not mentioned as being present in Queen Victoria's family, this option is incorrect.

- **Thalassemia**: This is also an autosomal recessive disorder that affects the blood's ability to produce hemoglobin. Similar to cystic fibrosis, it is not sex-linked and was not indicated to be present in Queen Victoria's family, making this option incorrect.

4. **Conclusion**: After evaluating all options, the only genetic disorder that was present in Queen Victoria's family is **Hemophilia**.

**Final Answer**: Hemophilia

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