In a paternal line, each male inherits from his father a perfectly identical and relatively unchanged Y chromosome over the generations .
In this context all men of the same lineage share this gene in common . It is only when a daughter is born that this hereditary line breaks. Because unfortunately women with only the X chromosome cannot transmit the Y chromosome.
The paternal lineage test determines whether the genes on the Y chromosomes are alike or not , and the conclusion that the tested males may be related through a common male ancestor.
Y-chromosome analysis cannot distinguish a specific relationship between males belonging to the same paternal line .
For example, the test will not be able to define paternity between an alleged father and an uncle if the two share the same Y chromosome.
However, it can be useful for excluding men from an alleged biological relationship.
- Two or more men can participate in the test
- The test can be done between different male individuals to determine a paternal lineage
If in your search for paternity, the doubt is about presumed fathers coming from the same family. Then the Y chromosome test is not suitable for your situation .
Please in this case consult our guide to finding paternity to find a suitable test.
Y chromosome analysis can also be used for genealogical research on the origins of your paternal ancestors.
DNA genealogy testing examines specific locations in your DNA to estimate ancestral genetic relationships. It allows you to compare and integrate your genetic profile into a database that lists and uses different ethnic groups of reference , composed of people tested and whose previous origins are known.
There are three main types of genealogical DNA testing , each examining a different part of the genome and useful for different types of genealogy research:
In order to have information on your origins :
- Know your ethnic percentage
- To find information on the origin of your family
- Understanding population migration
You wish to complete the archives genealogical of your family :
- Improve your classic genealogy research
- Discover and identify genetic matches
- Find family members
- Add your genetic profile to a database
The DNA genealogy test will not give you with certainty and accuracy a biological relationship between family members . It can give you a more or less distant relationship percentage that you must confirm with a relationship test in order to guarantee the biological connection.
The Y chromosome Ancestry
The genealogical test of the Y chromosome can be used to determine the origins of the paternal ancestry and to trace the ancestors family on your father's side.
In addition to providing you with important information in your genealogical research, this DNA test gives you access to:
- Your direct paternal line and your geographical origins
- Relationships with people who have the same DNA
- The ancient migration paths of your male ancestors
- Your paternal affiliation to the haplogroup
The Y chromosome makes it possible to investigate a man's paternal line very precisely. So this process can help you find parents who are unknown or lost to follow-up.
It is possible to order a genealogy test with the Y chromosome:
- This test is done individually
- With a saliva sample only
- The results are available in English
- Analyzes are ready in 4 - 5 weeks
The paternal line test
Maternal line research
The Mitochondrial DNA test allows anyone to compare this specific DNA from the biological mother to determine a common maternal lineage.
Paternity search between sisters
The analysis of the X chromosome makes it possible to define whether the two sisters share the same paternal X chromosome. For this it is mandatory that the sisters share the same biological mother
Participants of the paternal line test
Y Chromosome Results
The quality of the DNA will depend on the collection and storage of the samples . It is therefore important to follow the instructions of the laboratory in order to ensure that you receive results.
Accredited laboratories meet the requirements relating to the analysis process, the management of resources and equipment, the impartiality and confidentiality of information. For a Y Chromosome test the laboratory must have ISO 17025 accreditation .
The Y chromosome test offers a 100% reliable negative result and a 99.9% reliable positive result .
DNA analysis is a direct relationship test. The genetic laboratory compares the profile of each individual to determine whether they are similar or not. So the answer is either positive or negative, there is no room for doubt.
It is not possible to obtain inconclusive results .
To verify the relationship of participants:
The first participant must have an identical genetic profile to the second participant.
If the match is perfect the relationship is concluded, otherwise it is rejected.
Test de Chromosome Y
Echantillon non standard
+149€ résultat en 2 jours
Order your DNA test kit online
Receive your DNA kit
To return to
Discover your results
The Y chromosome DNA test is a genetic comparison between two male participants to determine a paternal relationship.
The Y chromosome is one of the two sex determining chromosomes. Its peculiarity is that only men have it, because it is only transmitted of father to son, from generation to generation .
The Y chromosome DNA test consists of analyzing the markers of this DNA, in order to define your paternal line with very high precision . It can therefore by definition determine whether two or more men come from the same family.
The test can be done with buccal samples and discrete samples.
What is a Y chromosome test?
You can order a test to know your link directly on the internet at home in order to receive the sampling material at home.
It often happens that the participants can be geographically distant, in this case the laboratories propose to send a genetic kit to each of the participants.
Unfortunately it is still impossible to obtain a DNA test in a pharmacy , moreover only a laboratory with genetic analysis equipment and accredited by international standards can provide the result for a Y chromosome test.
How to do a Y chromosome test?
Genetic analysis of the Y chromosome to determine the paternal lineage and the search for paternity can be useful in several constructions depending on the participants:
- Genetic analysis between brothers and/or half-brothers (different biological mother)
- Genetic analysis between cousins (on the paternal side: the son of the uncle)
- Genetic analysis between a nephew and an uncle (the uncle must have the same biological father as the father sought)
- Genetic analysis between a grandson and his paternal grandfather
Under what condition can we define a paternal line ?
Consent is the agreement you give to the laboratory to use your DNA for the purpose of carrying out a genetic analysis. It is mandatory if you want to do a Y chromosome test. Consent can only be given explicitly by an adult and fully lucid person. This agreement must be in writing after having received informed information about the results of the test, by a contract or a consent form.
It is against the law to do a DNA test without the person's consent.
For minors, consent must be provided by one of the legal parents.
What is consent for a DNA test?
- 5-7 days using buccal swabs for all attendees
- 10+ days if a participant uses discrete samples
This time is calculated from the moment your samples arrive at the laboratory. Delivery time is not taken into account.
What are the analysis times for a paternal line test ?
The reliability and authenticity of the test DNA depends on several factors:
- The quality of the samples
- Laboratory accreditation
- The choice of the test according to the family situation
How reliable are the Y chromosome results ?
The results are presented in the form of a table:
- Each column corresponding to a participant
- Each line to a compared gene
- The composition of the gene is represented by one or two numbers/per person
How to read the results of the Y chromosome test ?
The choice of laboratory is a very important step when you want to do a parentage test. You should know that each of the laboratories has specific services and depending on your situation it is obvious to make the choice that suits you.
The choice of a laboratory can be made according to:
- Your family situation and available participants
- The confidence that the laboratory inspires through customer feedback
- The transparency of the company concerning its activities and your expectations