X chromosome testing

The X test is a type of sibling DNA test carried out only between females who wish to know if they have the same biological father. X chromosome testing results have a turnaround time of 17-15 working days.

Sample collection

Sample collection is done using our home sample collection kit. Every test participant will be provided with 4 oral swabs. Once sampling is complete, you need to return samples to the laboratory using the pre-addressed envelope you find inside your kit. You kit will be sent out after you confirm your order and will arrive in around 2 working days.

Using a DNA testing kit provides the simplest and most straightforward way of carrying out a DNA test.

Important test information

Females have a total number of 46 chromosomes in every cell with 1 pair of XX chromosome (sex chromosomes). All females will share an identical X chromosome with their biological father. With this test we only look at genetic markers specific to the X chromosome, seeking for a match in profiles between the individuals tested. Identical X chromosome profiles means the females tested share the same birth father.

X chromosome testing is ideally done between females who have different biological mothers and who need to confirm whether or not they have the same biological father. The test is highly accurate.

If female siblings have the same mother we cannot offer X chromosome testing, unless the sample of the mother is available for analysis. The mother’s DNA sample is indispensable in such cases.

The X chromosome test can be used between paternal grandmother and granddaughter as they must share one X chromosome. This shared X chromosome is the one that the grandmother passed to her son and he, in turn, passed to his daughter. We only need DNA samples of the paternal grandmother and granddaughter for this test. We require no other samples in this particular case.

Real client testimonial:

The service was impeccable! I had an X chromosome test with a potential half sister, the test results came back over a week before they were due. The customer service is great too. I have used this company twice. Friends and family have too, we all share the same positive experience. Great company!” UK, 11th October 2016.

Cost of test

EasyDNA offers X chromosome testing starting at €399. This is for the testing of two individuals. Testing additional people will be at an added cost.

We do suggest you contact us to discuss your case. Alternatively, why not read up further about DNA sibling DNA tests offered by EasyDNA Ireland?

Why not consult a genetic counsellor about your results?

Our genetic counsellor is ideal if you have any concerns about your DNA test results. They can understand and interpret all aspects of your results, helping you understand any technical language you do not know, answer all your questions or simply explain the results to you. Once you have ordered the service, our genetic counsellor will get in touch with you to organize the date and time of the actual call. The session discussing your results will take place via Skype. Genetic counselling is available at an additional fee.

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