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home > DNA Testing
Siblings
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en espanol
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DNA TESTING SIBLINGS
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We have a range of quality paternity tests from our ISO-17025 Accredited
laboratory. Prices below are for testing 2 persons. Often it is useful to
include DNA from either parent or additional siblings to increase the accuracy
of the test.
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BROTHERS Y TEST - $295
Testing Brothers for the same father.
- All men have one Y chromosome which they pass to all their
sons.
- By testing the Y chromsome in two or more brothers we can see
if they have the same father.
- This DNA test is 99.9% accurate.
- Note: This test can be used to test a variety of male relations
(ie. uncle-nephew, grandfather-grandson, etc.)
- You may order
the free kit (paperwork, swabs and instructions),
buy the test
now, or else you can download instructions to take a
brothers
Y test right now.
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Only males have Y chromosome DNA.
Fathers pass their Y DNA to their sons, so the Y DNA
in brothers with the same father is always identical.
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SISTERS X TEST - $295
Testing Sisters for the same Father.
- All men have one X chromosome which they pass to all their
daughters. By testing the X chromsome in two sisters we can see
if they have the same father.
- This DNA test is 99.5% accurate.
- Note: This test is best for sisters with different mothers,
or, if they have the same mother, then include the Mother's sample.
- Order the free
kit (paperwork, swabs and instructions),
buy the test
now, or else download instructions for a
Sisters X
test now.
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The flow of X chromsome DNA from Father to daughters
can be seen in the image above.
Sisters of the same father will share the exact same
X.
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MITOCHONDRIAL DNA TEST- $295
Testing siblings for the same Mother.
Mitochondrial DNA is only herited from the Mother, so it is the
ideal test to see if siblings have the same biological mother.
The accuracy of the test depends very much on the type of mitochondrial
DNA you have. If two matching persons have a rare type of Mitochondrial
DNA then they are more likely to be siblings, than two persons who
match with a common type of mitochondrial DNA. The probabilty of
you being related is calculated after we know what type of DNA you
have.
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Mitochondrial DNA is passed from Mother to children.
Men have Mitochondrial DNA but they do not pass it on.
Mitochondrial inheritance explained.
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FULL SIBLING TEST - $395
Testing siblings for the same Mother and Father
- If you need to test a brother and sister for the same father,
then you will need to do a full sibling DNA test. This test is only
around 80% accurate, and looks at the amount of DNA sharing between
siblings. Accuracy is drastically increased with DNA from other
siblings or the mother, please
contact us to disuss.
- Siblings share more DNA than do unrelated persons.
- Order the
free kit (paperwork, swabs and instructions),
buy the test
now, or else download instructions for a
Sisters X
test now.
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The full sibling DNA test works by analysing DNA in
each sibling and calculating the likihood of them being related
or not.
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