Haemophilia is an inherited deficiency whereby the substance necessary for blood clotting is missing. The transmission of this condition is sex linked, being present mostly in males but carried solely by females. Sons of a haemophilic male are normal, but daughters, although outwardly normal, may transmit this deficiency to half their sons.
The existence of haemophilia in certain royal families of Europe is well known. Working from family trees it seems probable that Queen Victoria naturally produced the gene for haemophilia.
|
Fact File: When we look at other human bodies, we usually concentrate on the face. Our features are largely inherited, under control of the gens, which is why we resemble our parents. |
Picture Credit : Google