Is Dna Ancestry Testing Accurate - 1645 Words

Is DNA ancestry testing accurate? DNA ancestry testing cannot accurately pinpoint where a person s ancestors originated: If not for genetic flow, distinguishing the DNA of a person s ancestors from others might have been relatively easy (Gamber). The inhabitants of a particular geographic region would have contained a smaller range of genetic variation (What Is Genetic) and over time, developed specific genetic mutations that could be used to identify them as a distinct population. However, most human populations have migrated numerous times throughout history and mixed their genetics with many other groups (Gamber). This creates difficulty in identifying where exactly a person s ancestors came from. DNA tests cannot account for†¦show more content†¦However, the same SNPs may be found among several populations and is limited by the diversity of the SNP database, thus potentially producing false positives (Admixture Analyses). DNA testing cannot accurately tell which ethnicity or social group a person s ancestors belonged to: Likewise, DNA testing cannot accurately identify which social group someone s ancestors belonged to, for much of the same reasons. The high frequency of human migration has also meant that there are no noticeable genetic differences between many groups, even ones with strong cultural boundaries. Similarly, most distinctions in isolated populations are not significant enough to be identifiable (Siddique). This, combined with the fact that over time, social groups have changed in name and composition (Than), makes connections to historical groups, such as Viking or Zulu, vague. Despite this, David Nicholson, director of the DNA Worldwide group says that [ with advanced testing you can be provided a general ancestry indication] (Siddique). This is achieved through using SNP markers to attempt to differentiate between what is seen as four biologically distinct populations, Africans, Europeans, Asians, and Native Americans. However, these tests have been shown to be flawed with some Eas t Africans not being classified as Africans because they have different variations in their genes. This means that a large percent of the African populationShow MoreRelatedIntroduction. Forensic Dna Phenotyping Is A New And Emerging1577 Words   |  7 PagesIntroduction Forensic DNA Phenotyping is a new and emerging field of forensic science. As it is so new, there is very little in terms of literature on this field, very little testing done on this type of identification, and few cases that have used DNA Phenotyping to assist in the investigation. The first documented case of DNA Phenotyping being used is in the early 2000s, so it has had under 20 years of research and experimentation with it. There are many weaknesses to the version of DNA Phenotyping thatRead MoreGenetic testing is a class of medical testing that recognize changes in chromosomes, gene or1300 Words   |  6 PagesGenetic testing is a class of medical testing that recognize changes in chromosomes, gene or proteins. This type of test look for abnormalities in DNA or RNA that is collected from a person’s blood, body fluids or tissues. Genetic testing scans the genes looking for large or small change that occur to gene. These changes to the genes could have missing or additio n parts that could change the chemical base within the DNA strand. Abnormal genes could be the result of other mistakes like the genesRead MoreGenetic Testing : Types Of Medical And Forensic Tests1715 Words   |  7 PagesGenetic Testing WHAT IS GENETIC TESTING? Genetic Testing is the process of using medical and forensic tests to identify and analyse a human, animal or plant DNA sequence. 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