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Hemophilia in the Queen Victoria's family
Haemophilia is a disease in which a person's blood fails to clot when they are hurt. Most cases of
hemophilia are found in interrelated royal families. Nowadays, hemophilia can be treated. The treatment
for hemophilia is called replacement therapy: a more efficient clotting factor is injected into the patient's
blood.
The document shows all the haemophiliac people in Queen Victoria's genealogical tree.
1- Explain what hemophilia is.
2- How many generations are present in this genealogic tree?
3- Who are the parents of "Béatrice"?
4- How is the abnormality represented in the document?
5- Explain why it is called a hereditary disease.
6- Alexis, the son of the last czar of Russia, inherited it from Queen Victoria. What is the family
relation between Alexis and Queen Victoria?
7- Why can we say that this disease depends of the person's sex?