Mutations in the F8 gene cause hemophilia A, while hemophilia B is caused by mutations in the F9 gene. The proteins made by these genes play a critical role in the process of blood clotting.
There are many different types of imaging tests used to diagnose diseases of the digestive system. Computed Tomography (CT Scan) A CT scan, computed tomography, takes multiple X-rays of the body from different angles in a very short period of time.
The test that is used for Downâs syndrome is a combined blood test and an ultrasound scan, which is known as the âcombined testâ. The 'combined test' is just a statistical method used in screening. Your text directly implies it is the diagnostic test used to investigate a postive screen test.