When would you need an X chromosome test?

  • An X chromosome test can help females establish whether they share  the same biological father. If the females tested have different mothers, we do not require the addition of the mother’s sample for the test.
  • In cases where females share the same mother, they can still carry out an this test but only if the mothers sample is available for testing.
  • 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.

How do I order my test?

At easyDNA we offer a full range of Sibling DNA tests including Y chromosome testing (used strictly between male test participants) and X chromosome testing (used strictly between female test participants). this includes testing two females. Select your test depending on the number of test participants and whether the mother’s DNA sample is available for the test.  A pre-addressed enveloped is provided for you to send the samples back to the lab. You will receive your results in 15 working days from receipt of samples.

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

Collecting samples for your X chromosome test

Once you have placed your order we will send out your DNA test kit. Kits are pre-packed and contain swabs for up to 3 test participants. Swabs need to be rubbed inside the mouth for just ten seconds and then left to dry. For detailed, step-by-step instructions on how to use your DNA testing kit please visit our sample collection guide page.

About the X chromosome

Every female has one XX chromosome pair in every cell. The X chromosome is one of the 2 chromosomes which determines sex. The X chromosome is also much more complex and carries far more genes than the Y; in fact they carry 2,000 : 50 respectively. There are certain abnormalities where people can have extra X chromosomes or other abnormalities in this chromosome. Because both males and females have X chromosome any chromosome abnormalities may manifest themselves in different ways. Some examples of X chromosome autosomal abnormalities include Klinefelter syndrome and Trisonomy X.