Why does hemophilia mostly affect males?

The gene is on the X chromosome

How is hemophilia commonly treated?

Replacing the missing clotting factor

Hemophilia Quiz: Clotting Factors and the Royal Disease

This hemophilia quiz looks at blood that struggles to clot. Play 10 interactive questions on missing clotting factors VIII and IX, hemophilia A and B, why the gene on the X chromosome mostly affects boys, bleeding into joints, Queen Victoria as a carrier, the royal disease reaching Russia's Tsarevich Alexei, factor replacement treatment and World Hemophilia Day.

Start Hemophilia Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

What
What is hemophilia?
Factor
What is missing or low in hemophilia?
A
Which factor is low in hemophilia A?
B
Which factor is low in hemophilia B?
Boys
Why does hemophilia mostly affect males?
Joint
Where can internal bleeding cause lasting damage?
Queen
Which queen was a famous carrier?
Royal
What was hemophilia nicknamed?
Alexei
Which Russian heir had hemophilia?
Treat
How is hemophilia commonly treated?

Explanations: answer key for all 10 questions

Q1: What is hemophilia?
Answer: An inherited bleeding disorder
Blood clots poorly.
Q2: What is missing or low in hemophilia?
Answer: A clotting factor
These proteins help seal wounds.
Q3: Which factor is low in hemophilia A?
Answer: Factor VIII
It is the most common type.
Q4: Which factor is low in hemophilia B?
Answer: Factor IX
It is also called Christmas disease.
Q5: Why does hemophilia mostly affect males?
Answer: The gene is on the X chromosome
Males have one X.
Q6: Where can internal bleeding cause lasting damage?
Answer: In joints
Knees and elbows are common sites.
Q7: Which queen was a famous carrier?
Answer: Queen Victoria
Her descendants carried it to other royal families.
Q8: What was hemophilia nicknamed?
Answer: The royal disease
European royals were affected.
Q9: Which Russian heir had hemophilia?
Answer: Tsarevich Alexei
He was Victoria's great-grandson.
Q10: How is hemophilia commonly treated?
Answer: Replacing the missing clotting factor
Newer therapies also exist.

When Blood Struggles to Clot

Hemophilia is an inherited bleeding disorder in which the blood lacks enough of a clotting factor, one of the proteins that help seal wounds. Hemophilia A, the most common type, involves low factor VIII, while hemophilia B, also called Christmas disease, involves low factor IX.

The genes are on the X chromosome, so the condition mostly affects males, who have one X, while females are usually carriers. Bleeding can happen inside the body, especially into joints like knees and elbows, causing lasting damage if untreated.

Hemophilia was nicknamed the royal disease because Queen Victoria was a carrier, and her descendants carried it into royal families of Europe. Her great-grandson Tsarevich Alexei of Russia had hemophilia. Today, treatment replaces the missing factor, and newer therapies are expanding options.

What This Quiz Teaches

Body science fans will enjoy these questions.

What hemophilia is
Which factors are involved
Why males are affected
How it touched royal history
How it is treated

Did You Know?

World Hemophilia Day is on 17 April.
Carriers may have mild symptoms.
Bruises can appear easily.
Dentists take extra care with patients.
Gene therapy is a newer option.