Haemophilia became known as the royal disease because it
- A. was cured by royal physicians
- B. is common in every royal family
- C. was traced through the descendants of Queen Victoria
- D. was first described by a king
Explanation
Victoria carried the allele and passed it into the royal houses of Russia and Spain, producing affected princes across Europe. The pedigree became the classic textbook example of X linked recessive inheritance.
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