Why are human females rarely haemophilic? Explain. How do haemophilic patients suffer?

Explanation

### Step-by-Step Solution:

1. **Understanding Hemophilia**: Hemophilia is an X-linked recessive disorder that affects the blood's ability to clot. This means that individuals with hemophilia have a higher risk of excessive bleeding, especially after injuries.

2. **Genetic Basis**: The gene responsible for hemophilia is located on the X chromosome. In humans, females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

3. **Females as Carriers**: For a female to express hemophilia, she must inherit the hemophilic gene on both of her X chromosomes (XhXh). If she has one normal X chromosome (XHXh), she will not show symptoms of hemophilia but can pass the hemophilic gene to her offspring. Therefore, females can be carriers of hemophilia without being affected by it.

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