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Paternity Testing on Absent Father
posted by admin @ 3:13 PM
Friday, September 25, 2009
By Kevin Camilleri
DNA testing is one of the most conclusive ways available to determine paternity of any given child. By taking a sample of DNA from both the alleged father and from the child in question, high-tech DNA profiling techniques are used to match reference points across genetic markers on both samples which can lead to an accurate determination of where a genetic relationship exists.
In an ideal world, paternity testing would have available both a sample from the child and from his alleged father in order to best establish the link between them. However, in some DNA paternity testing cases the father is not available to give his DNA sample, whether through choice, or unavailability for some other reason. However, where the father is absent, it is still possible to use other DNA tests to determine whether a relationship exists.
DNA Testing on Other Direct Relatives
By performing DNA testing with other members of the family that share some of the same genes with the alleged father, it is possible to determine whether or not there is a likelihood of paternity over the child in question. Obviously the father’s sample is desired for reasons of accuracy and conclusivity, however it is more than possible (particularly with advancing testing technologies) to be able to determine paternity through shared genetic material through more distant relatives to the father. In other words, provided a relative of the alleged father is available for DNA testing, you should be able to obtain some results although this may not always be conclusive.
DNA Testing on Grandparents
In the absence of the alleged father or any separate sample of his DNA, the alleged paternal grandparents can provide the key to establishing paternity. By taking a sample from either one or both the grandmother and grandfather of the baby, it is possible to determine even in the absence of the father whether or not there is shared genetic material and consequently whether or not there is a shared relationship, i.e. parentage.
DNA Testing on Male Relatives
Y-STR testing is one of the most innovative DNA testing methods honed in recent years, tracking down the male-only Y- chromosome to establish genetic links between male children and elder vertical male relatives, for example grandfathers, great grandfathers, even great uncles by blood relationships. This can be particularly handy where the father is unavailable and direct elderly relatives have died, given that a great deal of genetic material passes unmutated from father to son throughout generations. Of course, this is however absolutely of no use for DNA testing of female children.
DNA Testing on Siblings
Alternatively siblings can also provide a close genetic match, which makes it possible to test whether or not two children are related by the whole blood, rather than half. Where there is dispute over the potential father of a child, an alleged sibling’s sample can be a good way to compare DNA to determine the extent of the relationship. The same can be said for brothers and sisters of the alleged father, who can also share some genetic material sufficient to provide a result in DNA testing of the child in question,
If your situation requires is such that you require to do the DNA testing through one of the alternatives above, it is always advisable to contact in advance the company who will be performing the DNA test and explain your case in full so that they can advise you on the DNA testing options available as well the results that can be obtained.
8 Responses to “Paternity Testing on Absent Father”
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I am the grandmother of 2 little girls,but I dont think they are my sons. May I use my sons father (THE GRANDFATHER) and the 2 little girls to prove if they do belong to my son?
Thankyou,
Marsha
Fulcher
Hello Marsha,
Yes we can do the test using the grandparents.
Sincerely,
Briana
A woman contacted me claiming that we share the same father (I am female and have three other sisters and one brother). Her mother is alive and available, my mother and father are deceased. Can you determine, with a fair degree of certainty, that we are half-siblings?
Hello Terri,
We can conduct a sibling test between you and the woman who contacted you.
Like any lab Siblingship testing is a little more difficult because of the number of genetic combination that are possible between a parent and child. In order to get the most accurate results we recommend that your mother(s) or father(s) or any additional siblings participate in the testing as they provided 50% of each child’s DNA.
Average results seen with just a two possible siblings type of testing are 78% – please keep in mind that they can be higher or lower depending on the DNA.
I hope this helps. Please let us know if you have any other questions.
MY DAUGHTER PASSED AWAY AND HER TWO KIDS NOW LIVE WITH US AND THE DAD. HE IS HALF PUERTO RICAN DAD, WE ARE WHITE ANYWAY MY GRANDDAUGHTER LOOKS JUST LIKE HER DAD BROWN EYES AND SKIN BUT MY GRANDSON LOOKS JUST LIKE OUR SIDE. REAL WHITE BLUE EYES, IS THERE A WAY I CAN GET A DNA TEST ON HIM WITHOUT MY DAUGHTER? HIS SISTER? AND HIM THAT WOULD AT LEAST PROVE IF THEY ARE HALF SIBILINGS.
Hello Bonnie,
We have a couple of options for you. We can do a sibling test between your Grandson and Grandaughter.
Sibling DNA Testing is by far the most difficult test in all of the DNA relationship tests available. This is because, unless siblings are identical twins, they will have been given different sets of DNA from their parents. Sometimes even true full siblings will not match very well, and therefore the test is not very conclusive. When testing two individuals that might only share one parent, the test even more difficult and not nearly as conclusive.
Each parent gives a child half of her/his DNA. So, when we do a paternity or siblingship test, it is always wise to include the mother since she makes up half of the child’s DNA. We can eliminate that half and test the remaining against the possible father or sibling which gives us a more conclusive result. In the case of siblingship testing, we have to test all of the child’s DNA against all of the other child’s DNA. Including the mothers will tell us which half we do not need to test. Then we compare the remaining DNA to see what the probability of relationship is.
OR:
We can do a Paternity Test between the Father and the child in question.
Non-legal/Private: Cannot be used for any official purpose, for your knowledge only.
Two options – Self Collection or Professional Collection.
Self Collection: We can send a package to you for free via 2-day Priority USPS mail (or faster if you pay for shipping). This kit will allow you to swab yourselves in private and includes: Authorization form, swabs, instructions and a (free) pre-paid FedEx Next Day envelope. Also, if you have any questions, you can give us a call anytime and we will provide assistance to you.
Clinical Collection: Although it is not mandatory to go to a clinic for a private test, some people feel more comfortable having a professional collect the DNA samples. However, it is very easy to perform the DNA collection yourself, we will walk you through it and it will save you money since there is a fee for clinical collections, on top of the DNA testing fee.
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Legally-Binding/Court Admissible: “Legal” testing means that we will check your ID, take your photo and have you sign a chain of custody. In return, you will get a test result that is notarized and can be used for any legal purpose. The test result will never expire and can be used at any point in the future.
Legal tests are best if you think that you will need the results for ANY legal purpose now or in the future. (Such as birth certificate changes, health insurance, life insurance or death benefits, such as social security, etc.) If males are bringing in children without the mother for a legal test, they must provide a birth certificate or court order showing that they are the legal father/guardian who may sign on behalf of a minor child. It is always best to include the mother in the DNA as her participation greatly increases the accuracy of the test.
If you would like to schedule the DNA test, please give us the day and time that you would like to attend. We will arrange the appointment for you and send you an email titled “DNA Appointment Confirmation” which will contain all of the information needed for the appointment.
Please feel free to call, or email us with any questions or concerns.
Thank you,
Briana
I want to know if i can not test the father is it able to be done to find out if my children are full blooded siblings?
Hello Vicki,
We can test your children to see if they are full siblings or half siblings. We recommend that you participate in the test as well because you will strengthen the results. The reason to include the mother is that each parent gives a child half of her/his DNA. So, when we do a paternity or siblingship test, it is always wise to include the mother since she makes up half of the child’s DNA. We can eliminate that half and test the remaining against the possible father or sibling which gives us a more conclusive result. In the case of siblingship testing, we have to test all of the child’s DNA against all of the other child’s DNA. Including the mothers will tell us which half we do not need to test. Then we compare the remaining DNA to see what the probability of relationship is.
Please let us know if we can assist you and your family. You can reach us at toll free 888-362-4339.
Thank you,
Briana