Relationship Tests

Relationship testing can be used to confirm whether alleged relatives are really biological related. We can carry out testing between grandparents and grandchildren, brothers and sisters and other relatives. Begin getting the answers you need today.

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From $589

Siblings DNA Test

Do you share one biological parent, or both biological parents? Or perhaps none? GTLDNA offers sibling DNA testing services to help siblings discover whether individuals tested are full siblings, half siblings or no siblings at all.

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From $199

Twins DNA Test

GTLDNA offers an accurate twins DNA test which will establish whether twins are identical or fraternal. Our test is 100% accurate and results are ready in 5-7 working days.

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From $649

Grandparentage Test

Grandparentage DNA testing can be used when grandparents need to confirm the biological relationship to their grandchild. This test will show the statistical probability that the grandparents are genetically related to their grandchild.

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From $589

Aunt & Uncle Test

The aunt-uncle DNA test (or avuncular test) will determine whether a genetic relationship exists between aunts and/or uncles and their niece and/or nephew. Avuncular test results will show you a probability of relationship between tested parties.

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From $589

Y Chromosome Test

A Y chromosome test (Y-STR test) is used to determine if males tested share the same paternal lineage. The test is highly accurate and results are provided in just 7 working days from the receipt of samples at our laboratory.

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Genetic Reconstruction Test

A genetic reconstruction test is designed to establish if a child is biologically related to direct blood relatives on their father’s side of the family. The test is performed when the father in question cannot be directly involved in the test and a direct father-child paternity test cannot be carried out.

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From $295

Maternity Test

A DNA maternity test is used to determine a biological relationship between an alleged mother and a child. The test works in the exact same way as the DNA paternity test and the results guarantee minimum probabilities in excess of 99.99%+ for inclusion of maternity, and 100% for exclusion.

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Frequently Asked Questions

  • Relationship tests are carried out using a home sample collection kit. Once you have placed your order, we will send out your kit to whichever address you specify. If individuals are based in different locations, we can send out multiple kits to different addresses and if needed, we can also organize a couriered delivery (additional charges will apply in these cases).

    Our kits will contain the mouth swabs needed for the sample collection. We include 4 swabs for every person. All 4 swabs need to be used. The swabbing procedure entails simply rubbing the swab inside the mouth and under the tongue in order to collect dead cheek cells. To ensure the DNA you collected on the swabs is preserved, you will need to leave them to air dry for around 1 hour.

  • Relationship tests are often used instead of paternity testing. Let us say you wish to establish the paternity of a child but the alleged father cannot be tested for some reason or other. This is where relationship tests come in. By testing the DNA of the alleged father’s relatives, for example his brother, sister or parents, and comparing the DNA of one or more of his blood relatives to the DNA of the child (whose paternity is in question), we can establish whether the untested, alleged father is really the biological father of the child.

If you have difficulty deciding which DNA Testing service you require then Contact Us directly.