Which one of the following genetic diseases is sexlinked? 

(a) Royal haemophilia (b) Tay-Sachs disease (c) Cystic fibrosis (d) Hypertension

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1 Answers

(a) Royal haemophilia is sex- linked disease. Clotting of blood is abnormally delayed even small cut will result in non stop bleeding in the affected individual. Queen Victoria was a carrier of this disease and produce haemophilic descendents, so haemophilia is a royal disease.

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