X-chromosome linked diseases Haemophilia There are two forms of haemophilia Haemophilia A (factor Vill deficiency, )occurs in about one in 5, 000 live male births Haemophilia b (factor IX deficiency) occurs in about one in 10,000 live male births Clinical symptoms Haemorrhage into joints and muscles easy bruising, and prolonged bleeding from wounds Haemophiliacs are treated with clot factor VIll or IX Meanwhile the clot factors are produced by transgenic animals( expression with a mammallian gland promoter in goats or cows and extracted from the milk This released the patients from the burden being infected by tainted bloodX-chromosome linked diseases Haemophilia There are two forms of haemophilia. Haemophilia A (factor VIII deficiency, ) occurs in about one in 5,000 live male births. Haemophilia B (factor IX deficiency) occurs in about one in 10,000 live male births. Haemophiliacs are treated with clot factor VIII or IX . Meanwhile the clot factors are produced by transgenic animals ( expression with a mammallian gland promoter in goats or cows and extracted from the milk ) . This released the patients from the burden being infected by tainted blood . Clinical symptoms Clinical symptoms Haemorrhage into joints and muscles, Haemorrhage into joints and muscles, easy bruising, and prolonged bleeding from easy bruising, and prolonged bleeding from wounds. wounds