Paternity Test

Family relationship DNA testing

Gentras is a company devoted to the development and the marketing of innovative tests based on DNA analysis. A simple, painless mouth swab is all that is required to determine whether there is a biological relation between two individuals (for example siblings, cousins, grandparent/grandchildren).

Y test: male consanguinity

This analysis relates to male genealogy. For example it can determine if two or more brothers have the same father, but the test can be also used to establish a variety of male relations (i.e., uncle-nephew, grandfather-grandson, etc...). This is because all men have one Y chromosome they pass only to all their sons.

X test: female consanguinity

All men have one X chromosome, which is transferred to all their daughters. By testing the X chromosome in two sisters we establish if they have the same father. This test is best for sisters with different mothers. Mitochondrial DNA is inherited only from the mother, so it is the ideal test to see if siblings have the same biological mother. This test can be used to determinate a variety of female relations (i.e. aunt-niece, grandmother-granddaughter). The accuracy of the test depends very much on the type of mitochondrial DNA you bear in your genetic blueprint. If two matching persons have a rare type of mitochondrial DNA, then the test is much more informative about their consanguinity than two persons who match with a common type of mitochondrial DNA. The probability of you being related is calculated after we know what type of DNA you have.

Sibling test

If you need to test a brother and sister for the same father, then you will need to do a full sibling DNA test. This test is only around 80% accurate, and looks at the amount of DNA shared between the children. Accuracy is drastically increased with DNA from other siblings or from the mother. For this please contact us to discuss. The basis of the test comes from the fact that siblings share more DNA than do unrelated persons.

Twin test

DNA testing is the definitive method to determine if twins are identical or non-identical. We uses a simple mouth swab from each twin, we extract the DNA and profile it by using state of the art DNA testing processes. Identical twins (monozygotic) have the same exact genetic profile, while non-identical twins (dizygotic) have different genetic profiles, much the same as siblings.