Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
Christmas disease is another name for
BiologyPrinciples of Inheritance and VariationNEETNEET 2003
Options:
  • A haemophilia B
  • B hepatitis B
  • C Down's syndrome
  • D sleeping sickness
Solution:
1348 Upvotes Verified Answer
The correct answer is: haemophilia B
Christmas disease, also called haemophilia B or factor IX haemophilia is a genetic disorder caused by missing or defective factor $\mathrm{IX}$, a clotting protein. Haemophilia $\mathrm{A}$ is caused by a lack of the blood clotting factor VIII.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.