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The X chromosome test is done when two females believe they might share the same father. The test will thus be able to assist you to determine whether you are:
- Full sisters
- Half sisters
- Not related at all
In cases where two females have different mothers and want to confirm whether or not they share the same paternal father (thus, they wish to verify whether they are half sister or no sisters at all) they can carry out a motherless X chromosomes test. This means that they only need to submit their DNA samples.
In cases where sisters have the same mother and question whether they share the same biological father (therefore wanting to determine whether they are full or half siblings), we will need to carry out an X chromosome test with the mother’s DNA sample. The mother’s DNA samples is necessary to map her X chromosome and exclude it from the test, thereby, examining only the alleged father’s X chromosome pattern.
If the mother is not willing to be tested or simply not available, then a full siblings STR test will need to be done.
An X-chromosome test is done between siblings only in cases where a paternity DNA test cannot be carried out, as a paternity test is always preferable.
The X chromosome test for two siblings can be purchased for only $799. We will have your results ready in just 14 -21 working days from the receipt of the samples at the laboratory. To proceed with your test you can - Order Here
Alternatively you can return to our Relationship DNA testing page for more information.
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DNA Tests Available