Grandparent Testing

Grandparent DNA Test

Grandparent dna test

We guarantee our 44 marker DNA test is the most accurate Grandparent DNA test available.

When an alleged father is not directly able to be tested, at least one of his parents can perform a DNA grandparent test to help determine if he is the true father of a child.

Biological parents contribute equally to their son’s DNA, so that one-half of his DNA comes from each parent. When that child becomes a father, he in turn contributes to half of his child’s DNA. Therefore, half of the grandchild’s DNA comes from the grandparents, through the son.

Bio-Gene’s Grandparent DNA Test determines the  statistical probability that a person is the biological grandparent of a specific child. This DNA test requires the participation of at least one possible grandparent and the child. In cases where privacy is desired it is not necessary for the grandparent to disclose that that child is being tested

Private at home Grandparent DNA testing

Bio-Gene DNA Testing will only perform private peace of mind, at home grandparent DNA tests using a 44 genetic marker basis. While this much higher than the industry standard, we have found that it is always in our clients best interests to perform a higher marker test for accuracy. We do not perform 16 marker grandparent testing under any condition.

How much does a Grandparent DNA test cost?

Test Type

Turnaround Time


1 Person (Addition to Existing Case) 2 business days $125 »
2 People (1 Grandparent/1 Grandchild) 2 business days $249 »
3 People (1 Grandparent/2 Grandchildren) 2 business days $375 »
3 People (2 Grandparents/1 Grandchild) 2 business days $375 »
4 People (1 Grandparent/3 Grandchildren) 2 business days $499 »
4 People (2 Grandparents/2 Grandchildren) 2 business days $499 »
5 People (1 Grandparent/4 Grandchildren) 2 business days $625 »
5 People (2 Grandparents/3 Grandchildren) 2 business days $625 »


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Legal “Upgrade” from a Private Home DNA Test

If you are not certain that your DNA test will need to be legally admissible, we offer our clients as special “upgrade” program. If you purchase a home DNA test kit from us, and find out within 60 days of receiving the results that you need a court admissible DNA test, we will credit the amount you paid for our home test, up to $125.00, toward the cost of your legal test. If you find out you don’t need a legal test then this allows you to save the difference. If you do need to have a legal test performed then you will only need to pay the difference between the credit amount and the legal test cost. To upgrade a home DNA test, please contact a Genetic Consultant please call 1-844-246-4363.

If you wish to purchase a legal Grandparent test, please click here.

How DNA Samples Can Be Collected

The best method of DNA collection and testing is to use a buccal swab, which is similar to a “Q-tip” cotton swab, which has been rubbed on the inner cheeks of the mouth of those being tested. Sometimes it is not possible to obtain a buccal swab sample, for many reasons, including if the testing is being done discreetly. We are able to test alternative samples, normally at only a slight extra cost.

How it works graphic

To order your Grandparent DNA test kit, please complete the order form by clicking on the ORDER NOW button.

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When ordering a grandparent test you may choose to purchase a testing kit from Bio-Gene DNA Testing or make your own DNA kit. This may be especially helpful is you are using alternate samples, or do not want to wait for the testing kit to arrive to your shipping location due to time constraints.

What If Those Being Tested Live In Different Cities?

A DNA  test can be easily conducted even if the different parties to be tested are in different cities or even in different countries. Each DNA testing kit is assigned a unique identification number. If the different parties live in different cities or different countries, Bio-Gene DNA esting kits with the unique case number can be sent directly to each party. After collection, each individual can separately send the specimens directly to the DNA laboratory. The DNA specimens will be correctly matched at the DNA laboratory for each case using the unique case number. When ordering online, simply select the option of two or more kits (depending on the number of people testing) on the order form and enter the additional name and address in the box that will automatically show when this selection is made!

How Accurate Is The 44 Marker Grandparent DNA Test?

You may review actual case studies to learn about why our 44 marker grandparent DNA test is the most accurate test available by CLICKING HERE.

Grandparent DNA Testing Results

Due to performing a high marker test, Bio-Gene DNA Testing is able to deliver results that show conclusive results in almost every single case we handle. Results are provided in a PDF file through a secure login to the person ordering the test once they are ready, usually within 48-72 hours.

When dealing with probabilities, an 80% or greater probability of relationship is commonly accepted as proof for or against blood relationships. In the event that the son of the grandparent(s) being tested was the father of the child, the results show the probability that they are related, or it will show that they are not related.

The results are clear, understandable, and are definite. Testing results are always kept confidential and only shared with the person ordering the test, unless specific instructions have been given to do otherwise.

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If you have additional questions you can-mail us at, or you may call one of our Genetic Consultants at 1-844-BIO-GENE (246-4363) to discuss your case confidentially.