Grandparents’ DNA testing is one of the most reliable ways of determining paternity in case one or both of the parents are missing from the picture. It is possible because we have 25% of each of our grandparent’s DNA in us which makes it possible to determine paternity from their DNA.
Although the presence of at least one biological parent is important to make more accurate paternity reports. Nonetheless, grandparent DNA testing alone is more than enough to procure a reliable report on paternity.
It is worth noting that the results can show a false result which doesn’t always mean there is no relation between them. Chances are the child majorly inherited the father’s DNA which means you’ll need to test the paternal grandparents’ DNA also.
What are the options available in case of grandparents’ DNA testing?
Y chromosome DNA Testing-
Paternity DNA testing when a parent is absent is a tricky game and needs all the samples available including the mother’s DNA sample if present. But in most cases where both parents are unavailable and the child in question is a male child then scientists use Y chromosome DNA testing.
The reasoning behind this is that Y-chromosome travels through the males of a lineage without much change in it. This means it is easy to determine the paternity using that chromosome for accurate results.
One thing to note is that presence of the grandparent on the paternal side is necessary for this test.
Just like males have Y-chromosomes, females have mtDNA testing. Mothers pass their mitochondrial DNA without any changes to their daughters. Since only females do this, the presence of a maternal grandmother is necessary for this test.
Grandparents’ DNA testing can have many uses, like legal purposes or for peace of mind. So if you want to get a paternity DNA test as a grandparent you can visit our site and choose any test that suits your needs the most.