Siblings DNA Test

What can a sibling test tell you?

Are you half sibling or full siblings? If you are half siblings you will share around half of your genetic material and share only one parent. If you are full siblings, then you will share the vast bulk of your genetic material and thus, share both biological parents.

Are you half siblings or unrelated? If you are unrelated you will have very little, if any, genetic material in common (Although you could have common genetic material by random chance as DNA between all individuals is similar to some degree or other).

A siblings test is done in cases where direct comparison of parent-child DNA is not possible by means of a paternity DNA test or maternity DNA test. If a parent is willing to be tested, we advise sending in their sample as well to help give a stronger result.

View the types of sibling tests below:

• STR test – males and females wishing to know if they share one or both parents can do this test;
• X Chromosome test – a DNA test that will determine whether females share the same father;
• Y Chromosome test – a DNA test that will establish if males share the same father;
• MtDNA test – this test is done to confirm whether people tested share the same maternal line.

Return to our relationship testing page for more information about these tests or proceed with one of the below options.