Both forms of haemophilia result from mutations on the human X chromosome, a similar sex-linked pattern of inheritance as colour blindness.2
Each son of a female carrier has a fifty percent chance of having the disease, and each daughter has a fifty percent chance of being a carrier. An affected male’s daughters will all be carriers as he will pass on the mutated gene to them all; while he sons will not be affected11
Queen Victoria must have been a haemophilia carrier in order to pass the disease onto Leopold, this prompts the question; How did Queen Victoria receive the mutated gene?
The history of Queen Victoria’s father, the Duke of Kent, is well documented; and so we