Hemophilia pedigree chart

About this hemophilia pedigree chart

Hemophilia is a genetic disorder that impairs blood clotting. A Hemophilia pedigree chart traces the genetic transfer of the hemophilia gene through a family tree. It provides information about which family members are affected by it, are carriers, or are unaffected. This type of pedigree chart helps families assess the risk of inheritance and plan for medical care or genetic testing.

In a hemophilia pedigree, circles represent females, and squares represent males. A shaded square indicates a male affected by hemophilia, as the disorder is more common in males due to its X-linked recessive inheritance.

Females are typically carriers, which is represented by half-shaded circles. This means the female carries the hemophilia gene but does not display symptoms. Fully shaded circles represent rare cases where females are affected.

Horizontal lines connecting a circle and square represent marriage, while vertical lines dropping from them show their children. If a male family member inherits the hemophilia gene from his mother, he will be affected, represented by a fully shaded square. A diagonal line through a square or circle shows that the person is deceased.