In McCartney’s view, enough testing is already done in this country (sometimes too much) and there are issues of regulation and “informed consent”. “People are given very dramatic reasons to have these tests – it could help save your life, it could help improve the quality of your life – but where is the actual controlled evidence that these tests have ever done that? There’s no evidence that says doing these tests makes people become healthier.”
There is a TV show called Long Lost Family on TLC that uses Ancestry DNA and records to identify and locate families. I am not an adoptee but have taken tests with Ancestry and Family Tree DNA. I think using the Ancestry test would be better to help identify your birth parents since you could view your close matches and their family trees (if public). You can also download the raw data from Ancestry, FamilyTree, or 23&Me and upload them to gedmatch. Gedmatch is a free site where test-takers from different companies can compare results/matches without having to test with all three companies.
If this individual used several different companies for DNA testing, they might get an idea as to their past origins based on the moderate or high similarities of the people currently living in different regions throughout Africa. This is only possible if the companies have established the correct reference populations. This person must understand their DNA is being matched to the current population as opposed to the people who occupied the region hundreds of years in the past. It is just as possible the results would state this African-American individual is 75 percent European. This is because the ancestry markers chosen are only for a small percentage of this individual’s DNA. The African population has a more genetic diversity in itself than a European population and an African population.
This is a large amount of data not being used by services testing DNA. There are millions of SNP’s contained in your DNA. This type of testing only looks at specific variations. This requires between 100 and 300 AIM’s. This is a small fraction of the SNP’s differentiating DNA. This means if your test stated you are fifty percent European, it means only half of your SNP’s appear to be European. Another issue is certain markers used for ancestry information for any given test are only derived from either your Y chromosomes or your paternal line or your mitochondrial DNA or maternal line. When these markers are used, your test will be less accurate. Another flaw is the DNA testing services are obtaining DNA from the current populations in specific regions. This makes unsubstantiated conclusions that the people living in these areas hundreds of thousands of years in the past have had the same DNA for all these years.
DNA Diagnostics Centre offers a range of exciting ancestry testing services. Whether you’re looking to discover the origins of the maternal or paternal side of your family or you wish to determine your genetic profile and learn how much ancestral DNA you have from European, African, indigenous American or Asian peoples, we have the right test for you.
More controversially, some of these kits profess to tell you your biological (as opposed to actual age) by measuring the length of your telomeres (in basic terms, the caps at the end of each strand of DNA that protect chromosomes, like plastic tips at the end of shoelaces). Other tests, such as 23andMe, predict higher risks of developing serious conditions, such as multiple sclerosis, Alzheimer’s and Parkinson’s, including the test for BRCA1/BRCA2 (breast and ovarian cancer) that Angelina Jolie famously underwent, going on to have a preventative double mastectomy and surgery to remove her ovaries.