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Cousin Test
These tests are conducted for several reasons. They can confirm biological relationships in cases like adoption, egg or sperm donation, or inheritance disputes. Additionally, they support genealogical research, helping individuals build accurate family trees, learn about their family origins, and discover shared ancestry with others.
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Key Features of the Cousing Test
About Cousing Test
Because of variables like the inheritance pattern of genes within the family, cousin DNA tests often result in inconclusive or inaccurate outcomes.
First cousins only share about 12.5% of their genes. Children share around 50% of their genes with each parent, while aunts and uncles share around 25% of their genes with nieces or nephews. In comparison to these, 12.5% is an insignificant figure.
Because first degree cousins do not share 87.5% of their genetic makeup, establishing their biological relationship is very challenging. Strangers also tend to share an amount of DNA, so if two individuals happen to have common genes, it would be difficult to determine whether this is because of a biological relationship or random chance.
Hence, even though some companies offer cousin DNA tests, EasyDNA does not recommend undergoing these tests because accurate, conclusive results cannot be guaranteed.
Alternatives to the Cousin DNA Test
Instead of a cousin DNA test, we recommend other DNA tests that are proven to be more accurate in determining the biological relationship of alleged relatives.
Paternity and Maternity Testing
We often get requests from individuals wishing to obtain a cousin DNA test because they want to know if they are biologically related to their parent. If this happens to be your purpose, too, we recommend considering our Paternity Test or Maternity Test to make sure your test results are accurate and conclusive.
Y Chromosome Test
For male cousins who wish to seek their biological relationship through the paternal line, we recommend carrying out a Y Chromosome Test. If male cousins share the same Y chromosome profile, then it is safe to assume that they also share the same paternal bloodline.
Aunt & Uncle DNA Test
To determine the biological relationship between aunts and/or uncles and nieces and/or nephews, avuncular DNA testing can be done. This is often done in lieu of a paternity test when the alleged father is not available as it can establish the child’s biological relationship to the alleged father’s family. If your purpose is to establish paternity and the father is not available, an Aunt & Uncle DNA Test will yield more accurate results compared to a cousin DNA test.
mtDNA Test
Finally, individuals who wish to establish their biological relationship through the maternal line can consider mitochondrial testing or the mtDNA Test. By analysing the maternally inherited mtDNA and identifying if both parties tested have the same mtDNA profile, this test can establish two individuals’ common maternal lineage. Because the birth of a male child interrupts the mitochondrial line, it is important that the individuals tested must have an unbroken, traceable maternal line to carry out this test.
Click here for the full list of EasyDNA Relationship Testing. .
We recommend that you contact our customer service team to discuss your case and see if we can provide an optimal testing solution.
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The Human Tissue Act
It is important to be aware that in the UK the Human Tissue Act regulates the collection and analysis of any human tissue. In order to send a sample for analysis, the person or donor of that sample must give their consent in writing in order for us to test their sample. Furthermore, in order to be fully compliant with the Human Tissue Act, the donor of the sample must also be made aware of how their DNA sample will be used. Failure to comply with the Human Tissue Act is a criminal offence.
We will not proceed with any testing if we do not have consent from all test participants. Testing any samples will be put on hold until we get the required signatures from all individuals.
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