Disease - Bleeder's

Since males have only one X chromosome (XY), a single faulty gene causes the disease.

Regular infusions of replacement clotting factors allow patients to lead near-normal lives. bleeder's disease

Since females have two X chromosomes (XX), a healthy gene on one can usually compensate for a faulty one on the other. The Royal Connection Since males have only one X chromosome (XY),

Decades ago, the prognosis for someone with "bleeder's disease" was poor, often involving a short life expectancy and severe physical disability. Today, the landscape has changed: the landscape has changed: