About X chromosome testing

Females have an XX chromosome pair in every cell. One of the chromosomes in each pair is inherited from the mother and the other inherited from the father.


  • The X test is classified as a sibling test and its most common use is between females who wish to confirm whether they have the same father. For an X chromosome test to be accurate, the females involved need to have different mothers. In this case, the test will confirm whether they are half sisters or unrelated.
  • In cases where two females share the same mother and want to establish if they share a biological father, an X-chromosome test can be carried out but only if the mothers sample is available for testing. Only with the mother’s sample can we determine accurately whether their X chromosome patterns match, confirming that they share the same identical X chromosome profile inherited from their common biological father.
  • 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.

Order your test

Our X chromosome test includes the testing of 2 females and the analysis of DNA samples from two females. The price for the X Chromosome Test is £329.

You can select the test by simply going to our order page and selecting your test depending on how many females are being tested. Once you have proceeded with your order, your DNA kit will be sent to your chosen address. Our kit can be used to quickly collect the required DNA samples using sterile buccal swabs and following a very simple procedure.

Results are ready in 15 working days. For detailed, step-by-step instructions on how to use your DNA testing kit please visit our sample collection guide

Note: We can only guarantee standard result turnaround time for X chromosome testing when the test takes place solely using oral swab samples. Using a discreet sample for your test may lead to an increase in turnaround time.

Looking for another test?

EasyDNA offers a number of other tests including grandparentage tests and Y chromosome testing. We suggest you contact us or view different types of relationship tests.

This website uses cookies to give you a better user experience. By using this website or closing this message, you are agreeing to our Cookies notice