DNA Testing
What do the test results mean?
DNA testing is quite specific. For diagnosis, the testing is accurate. Someone who has a change in DNA that is known to cause genetic disease either has the disease already, or will develop the disease in the future.
Identity testing can prove that people are not related. But it doesn't always prove that they are. If people have key changes in their DNA that are not identical, they are not related. If enough innocent changes in the DNA molecules from different people are identical, the people are probably blood relatives.
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