Hemophilia A results from a missing or deficient clotting factor VIII, while Hemophilia B results from a missing or deficient clotting factor IX.
Sources
- Random Bruising: 13 Possible Causes Excluding Obvious Injury (healthline.com)
- https://www.cdc.gov/hemophilia/testing/how-hemophilia-is-inherited.html (cdc.gov)
- https://www.medlineplus.gov/genetics/condition/hemophilia/ (medlineplus.gov)
- https://www.msdmanuals.com/professional/hematology-and-oncology/coagulation-disorders/hemophilia (msdmanuals.com)
More in Science
- The term 'dump' in beam dump experiments is derived by analogy from the beam dumps used at particle accelerators.
- The origin of the NGF/IGN69 altitude system for metropolitan France was established from tide-gauge observations made at the Marseille Tide Gauge (Marégraphe de Marseille) between February 1, 1885 and January 1, 1897.
- The FDA approved olestra only on the condition that foods containing it be fortified with precise quantities of vitamins A, D, E, and K and carry a boxed warning label stating that olestra may cause abdominal cramping and loose stools and inhibits absorption of some vitamins and nutrients.
- In a wild baboon population studied by Gesquiere et al. (2011), alpha males had cortisol levels elevated to a range typical of the lowest-ranking males, while the lowest cortisol levels were found in second-ranking males.
- The megaraptor Joaquinraptor, described in 2025 from a partial skeleton in South America, had a crocodilian bone against its jaws, suggesting it may have been feeding on a crocodilian shortly before it died.
- George Atwood invented the Atwood machine as a laboratory experiment to verify the mechanical laws of motion with constant acceleration.