Relationship Tests – Greatnorth Forensics Inc

Relationship DNA Testing in Canada

Determine a Biological Relationship through Family DNA Analysis

At Greatnorth Forensics Inc we offer a range of DNA relationship tests to establish a range of relationships between alleged relatives. Tell us what you wish to find out and we will advise you on the test most suited to your needs. We offer a comprehensive range of relationship tests and can confidently answer any relationship query.

Our Relationship DNA Tests

Sibling DNA Test

Are you really siblings? Do you share the same parents? Siblings DNA testing is ideal in situations where alleged siblings (brothers and sisters) want to confirm their biological relationship and verify if they are full siblings, half siblings or not siblings at all.

Grandparentage DNA Test

Are you the grandparents of your grandchild or grandchildren? A grandparentage DNA test using samples from the grandmother, grandfather and grandchild, can confirm with accuracy whether grandparents are biologically related to their grandchild.

Aunt & Uncle DNA Testing

An aunt-uncle DNA test (also called an avuncular test) assesses whether an individual is the biological aunt or uncle of their niece or nephew. The results will show the probability of relationship between the people tested.

Twins DNA Test

DNA testing for twins that can determine if twin siblings are identical or non-identical. So are you monozygotic twins or dizygotic twins? Our turnaround time is approximately 7-10 working days.

Y Chromosome Test

A Y chromosome test is the ideal test to confirm a shared patrilineal (paternal) line between male relatives. The Y chromosome is inherited only by males and test results will provide you with the clear cut answer you need. Once the DNA samples are at the laboratory, you will receive your comprehensive DNA analysis report in 7-10 working days.

Maternity DNA Test

DNA maternity tests are used to establish biological relationships between an alleged mother and a child. All we need are oral swab samples. The results guarantee minimum probabilities in excess of 99.99%+ for inclusion of maternity and 100% for exclusion leaving zero doubts.

Mitochondrial DNATest

Do you need to find out if you share a common maternal ancestor? If this is your case, an MtDNA test is the right test for you. MtDNA testing (mitochondrial DNA testing) is used to determine whether two or more people have a common maternal lineage.

FAQs – Relationship DNA Tests

What is a sibling DNA test?

A DNA sibling test is used in cases where alleged siblings wish to confirm if they are biologically related. A siblings test can be carried out without the DNA sample of the known parent if, prior to testing, the siblings know they are definitely half siblings. In cases where siblings want to determine whether they are half-siblings, the sample of the known parent/s (this is normally the mother) is highly recommended to strengthen the result of the test.

How do we establish whether we have the same mother?

A maternity DNA test helps determine the maternal lineage of the test participants. In a Maternity DNA test we compare the DNA profile of the alleged mother and child/children to determine if their DNA matches at 50% level. A child inherits 50% of its DNA from each parent.

How conclusive are the relationship DNA tests?

Our DNA relationship tests (siblingship, aunt and uncle and grandparentage tests etc.) are performed to scientific standards accepted globally.

Siblingship Testing

DNA testing methods determine biological relationships within a family. A sibling DNA test determines whether two individuals (regardless of sex) are full or half siblings. However, unlike paternity DNA testing, which provides very conclusive results, siblingship DNA tests are not as conclusive and are probabilistic. If two individuals are full siblings, mathematically we expect them to share 50% of the genetic markers we test. If two individuals are half siblings, then 25% of their genes will be common. This allows us to determine statistically the chance that they would share the DNA if they are siblings, compared to if they are unrelated (i.e. if they matched by chance – population frequency). It is not possible to determine with 100% certainty whether or not two people are siblings. These results are reported on a likelihood scale. It should also be considered that there is a chance of inconclusive results with this kind of relationship testing.

More Information?