Name the scientist who reported haemophilia.

Explanation

**Step-by-Step Solution:**

1. **Understanding Hemophilia**: Hemophilia is a genetic disorder that affects the blood's ability to clot. It is classified as a Mendelian disorder, specifically an X-linked recessive disorder.

2. **Genetic Basis**: The gene responsible for hemophilia is located on the X chromosome. In males, who have only one X chromosome (XY), the presence of the hemophilic allele will result in the disease because there is no second X chromosome to provide a dominant allele.

3. **Symptoms of Hemophilia**: Individuals with hemophilia experience delayed blood clotting, which can lead to excessive bleeding even from minor injuries. This condition is often referred to as the "bleeder's disease."

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