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Sibling Tests
DNA Solutions offers a variety of testing options between siblings to determine if two or more separate individuals are actually biological siblings. Our sibling tests involve a comprehensive analysis between specific DNA patterns that vary from person to person. A full sibling test will also indicate if the alleged siblings are full siblings, half siblings or non-related.
Full sibling Test
This test investigates a high number of DNA regions. Full or half siblings will differ in the amount of DNA that they share. A Full Sibling to Sibling test looks at so many pieces of your DNA that we can make an assessment of your relationship. For example, full siblings will have matching DNA matching between them in 40% of regions tested, whereas non-related persons have DNA matching in approximately only 10% of regions tested.
To have the Mother's DNA sample (from both or either sibling) drastically increases the accuracy of the test.
Y-chromosome testing
 ($165 for each extra person)
Y chromosome testing is used to see if two or more male persons have the same biological father. If you also (or only) wish to know if they have the same Mother, then you will require a Full Sibling to Sibling Test.
Y-chromosome testing is your least expensive option while obtaining very high accuracy (99.9%+). Think about the two male persons you want to test. If it could be possible that the two brothers in question DO HAVE DIFFERENT FATHERS, ask yourself, could each of the two mens' real biological fathers were very closely related? (i.e., could each of the 2 brother's father's have been brothers themselves? or first cousins? or other type of close relative?)
If the answer is a certain no, then a Y-chromosome test is a great option. All men have one Y chromosome, it is passed down from Father to Son, and women have no Y-chromosome DNA. Therefore a Father and his 3 sons will all have the SAME Y-chromosome DNA.
X-chromosome testing
($165 for each extra person)
X chromosome testing is used to see if two or more female persons with different mothers have the same biological father. If you wish to know if they also have the same Mother, or you are not sure if they have different mothers then you will require a Full Sibling to Sibling Test.
X-chromosome testing is your least expensive option while obtaining very high accuracy (99.9%+). Think about the two female persons you want to test. Since it is possible that the two sisters in question DO HAVE DIFFERENT FATHERS, ask yourself, could each of the two sisters real biological fathers were very closely related? (i.e., could each of the 2 sister's father's have been brothers themselves?, or first cousins? or other type of close relative?)
If the answer is no, then an X-chromosome me test is a great option. All men have only one X chromosome, it is passed down from Father to Daughter, and women have two X-chromosomes. Therefore a Father and his 3 Daughters will all have at least one of their X-chromosomes exactly the same (the X from their father).
Click HERE to view our fee schedule |
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Other Relationship Testing
Grandparentage Tests
A grandparentage test is an indirect way to establish paternity, by determining whether a child is the true biological grandchild to a set of grandparents. This is especially useful in situations where the father may be deceased or unavailable for paternity testing.
There are many major testing options for Grandparent to Grandchild tests, however in most cases we do recommend that both grandparents (grandmother and grandfather) be tested to ensure a conclusive result. However, in some cases we can also test with only one grandparent.
We test to 99% accuracy and therefore we can only perform certain tests, with certain relatives being present. The following chart gives an example of pricing. |
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Testing the grandchild's
FATHER's parents |
cost |
Must have |
Better with |
Grandfather to Grandson
(Y chromosome test)* |
$595 |
- |
- |
| Grandfather to Granddaughter |
$795 |
Grandmother or Mother |
both Grandmother and Mother |
| Grandmother to Grandson |
$795 |
Grandfather or Mother |
both Grandfather and Mother |
Grandmother to Granddaughter
(X chromosome test)* |
$595 |
- |
Mother |
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*About Y-Chromosome tests:
For Grandfather to Grandson tests, Y-chromosome testing is your least expensive option while obtaining very high accuracy (99.9%+). Think about the father of the child (the son of the Grandfather), if this man is NOT the biological father of his son, then you need know if there is any possibility that the true biological father was not a close relative. (i.e., could other possible father be a brother, cousin or other type of close relative to the alleged father?)
If the answer is no, then a Y-chromosome test is a great option. All men have one Y chromosome, it is passed down from Father to Son, and women have no Y-chromosome DNA. Therefore a Grandfather, his son and his 3 grandsons will all have the SAME Y-chromosome DNA
*About X-chromosome tests:
For Grandmother to Granddaughter tests, X-chromosome testing is your least expensive option while obtaining very high accuracy (99.9%+). Think about the father of the child (the son of the Grandfather), if this man is NOT the biological father of his son, then you need know if there is any possibility that the true biological father was not a close relative. (i.e., could other possible father be a brother, cousin or other type of close relative to the alleged father?)
If the answer is no, then an X-chromosome test is a great option. All men have one X-chromosome, it is passed down from Father to Daughter, and women have two X-chromosomes. Therefore a Grandmother, her son, and her 3 Granddaughters will all have at least one of their X-chromosomes exactly the same.
Click HERE to view our fee schedule |
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Twin Zygosity Testing
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Identical vs. Fraternal Twins
Identical twins result when one egg is fertilised by one sperm, and then divides to cause two separate embryos. This means they will share identical DNA profiles and thus may share many physical attributes, such as eye colour, hair colour etc. However, because our environment may also affect our physical appearance, identical twins may not always look identical, even though they share the same DNA patterns. Identical twins are always of the same sex.
In contrast, fraternal twins occur when two eggs are fertilised by two sperms, and thus their DNA patterns are not identical. They may not be alike any more than other full siblings, and may be of the same sex, or different sex.
How does the test work?
It can be difficult to tell at birth if twins are fraternal or identical. A twin zygosity test is actually a series of individual tests where we will analyse at least sixteen loci (different regions of DNA) for each child that will vary between fraternal twins (and also normal brothers and sisters), yet is always identical in identical twins.
If we find any differences between the two children’s DNA, we can exclude them from being identical, and thus know them to be fraternal. A positive match in every region of DNA, however, will give us a positive result for identical twins.
With this type of testing, the accuracy is extremely high – greater than 99.99%
Upon receipt of your samples, results will be issued within 10-15 days. |
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