It is quite helpful to determine paternity by the means of grandparents and grandchild DNA test when the father is not available or deceased. The DNA profile of the grandparents encompasses all the key component of which the grandchild and the alleged father’s DNA is composed of. This DNA test can be deemed more accurate if both the grandparents are available for the paternity test.

Can I test one grandparent, or is it recommended to test both?

It is possible to conduct a paternity test using a grandparent DNA testing using the sample of one or both the grandparents. But, testing just one grandparent can possibly offer inconclusive outcomes which, in other words, many companies do not provide. A legible laboratory would always recommend testing both of the grandparents, although, it is enough to test just one, scientifically speaking. With a grandfather or grandmother DNA test, it is suggested to include the mother’s sample as well. Although some DNA labs don’t provide this option anymore, it is quite likely to proceed under the condition that it is the sole option which is available. You can obtain a more accurate result when you include the mother’s sample too. It is also advisable to keep an open mind while attaining the report as it could likely yield a false negative result. In other words, it indicates no relationship exists indeed when it really does. This happens when the child has likely inherited DNA from the alleged father that came from the grandparent who wasn’t tested. This is why it is always preferred that both the grandparents should be submitted for testing. This will hence, enable the lab to have a broader or the fuller view of the entire picture.

Understanding the Grandparent DNA testing: missing person report

Each person’s DNA profile consists of two values on every genetic marker. One value is derived from the mother, while the other from the father. Each genetic marker of the child that encompasses the value derived from the father should also match the values encompassed in the Grandparents’ DNA profiles. When the clear view of the grandparents’ DNA profiles are attained, the lab is able to ascertain if the child is the match or not. All the probable combinations are subjected to evaluation and conclusions are drawn. Eventually, it is possible to ascertain with accuracy whether or not the paternity of the missing father is excluded or included. This is referred to as a missing person report and it is quite helpful in ascertaining paternity when the alleged father is defunct.

Grandparent DNA testing: Y Chromosome

If we have a male child and only paternal grandparent is available, then the Y chromosome test is undertaken. The test is proven quite helpful in ascertaining if two males belong to the same male lineage. Generation after generation, the Y chromosome is transferred from male to male. This test makes it possible to attain an accurate result and helps in ascertaining the paternity when the alleged father is absent. DNA testing technology has made it possible to explore other options to answer the question of the paternity.