Confirm a Biological Grandparent–Grandchild Relationship
A grandparent DNA test compares the DNA of a child with one or more alleged grandparents to determine the likelihood of a biological relationship.
This test is especially useful when the alleged father or mother is unavailable for direct paternity or maternity testing.
Testing both grandparents from the same side of the family can generally provide stronger evidence than testing only one grandparent.
Accredited DNA Testing You Can Trust.
How It Works — 3 Easy Steps
Why Choose Forensics Canada Inc.?
Difference between a Home DNA Test and a Legal DNA Test
Have Questions or Need More Information?
Mon – Fri: 09:30 am to 5:30 pm
Saturday: 10:00 am to 04:00 pm
Sunday: Closed
Understanding Your Grandparent DNA Results
A grandparent DNA test compares genetic markers between a child and one or more alleged grandparents.
Because a grandchild inherits DNA through their biological parent, the laboratory uses statistical analysis to calculate how strongly the DNA evidence supports the claimed grandparent-grandchild relationship.
Unlike a direct paternity test, grandparentage testing is a relationship-probability test. Testing both grandparents from the same side of the family can often provide stronger evidence than testing only one grandparent.
Yes. If two grandparents are being tested to evaluate one parental line, they should be the biological parents of the same alleged mother or father.
Grandparent DNA testing may be a useful option when the alleged biological parent is deceased or otherwise unavailable. Testing one or both biological parents of the alleged parent can help assess the claimed relationship.
Yes. Participants do not normally need to be in the same location. Home collection kits can be arranged for participants at different addresses. Legal testing may also be coordinated at separate approved collection locations.
Our grandparent DNA test starts at $349. Additional fees may apply depending on the number of participants, collection requirements, or whether legal chain-of-custody testing is required.
Results are typically available within 7–10 business days after the laboratory receives all required samples.
Legal grandparent DNA testing may be used for court or other official purposes when proper identification, witnessed sample collection, and documented chain-of-custody procedures are followed. Home tests are intended for personal knowledge.
DNA is usually collected using simple cheek swabs rubbed gently inside the mouth. For personal testing, samples can usually be collected at home. Legal testing requires identity verification and controlled chain-of-custody sample collection.
Grandparent DNA testing uses statistical analysis to calculate the likelihood of a biological relationship. Unlike a direct paternity test, results are expressed as a probability or relationship likelihood rather than a simple near-100% inclusion or exclusion.
A grandparent DNA test does not directly test the alleged father. Instead, it evaluates whether the child is biologically related to the alleged father’s parent or parents. This can provide evidence supporting or excluding the claimed family relationship.
Testing both grandparents from the same side of the family can usually provide stronger statistical evidence than testing only one grandparent. If only one grandparent is available, testing may still be possible.
Yes. Grandparentage testing can be performed without the biological parent. However, including additional family members when available may strengthen the analysis and help produce a more conclusive result.
Grandparent DNA testing is often used when the alleged biological parent is unavailable, unwilling, or unable to participate in a direct paternity or maternity test.
A grandparent DNA test compares the DNA of a child with one or more alleged grandparents to determine the likelihood of a biological grandparent-grandchild relationship.
