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Male Lineage Y-Chromosome

DNA Testing.

A Male Lineage Y-STR comparison test can tell you whether or not a child is related to the alleged father's brother (s) and other male relatives who share a common paternal line.

Results in 3-5 Business Days

My Dad has Passed. How do I Know if He Really was my Biological Father?

Our Y-Chromosome DNA test identifies direct male lineage. This paternal-relative (Y-STR) comparison test—also known as a paternal lineage test—can confirm a relationship to a relative on the direct-male line. This test is also used to provide additional evidence in difficult paternity situations in which a possible father is not available for testing—indirectly, it can tell you whether or not a child is related to the possible father’s brother(s) and other male relatives who share a common paternal line. The report is posted to your secure online account 5 business days after all samples have been received at the lab. There are many relationship questions that can be answered by Y-Chromosome DNA testing.

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The Y-STR paternal lineage test is used to determine whether two or more males are related through their fathers (through the paternal/male line).

 

Who needs to be tested?

  • Two (2) or more males who believe they share the same male lineage  

 

Turnaround Time

  • Five (5) business days from receipt of all samples

 

Chain-of-Custody Requirements

Chain-of-custody requirements must be fulfilled for test results to be defensible in any legal situation, such as inheritance disputes. These requirements include the following:

  • Samples are collected by a neutral third party, such as a clinic or laboratory

  • The individuals tested are positively identified (i.e., they present a government-issued ID to be photocopied and/or they are photographed and fingerprinted)

  • A standard kit is used

  • Each party completes and signs a Client Identification and Consent Form (COC-4002)

  • Guardianship of tested minor must be verified at the time of signing consent

  • The kit may not be in the possession of the clients prior to or after being collected

  • If a Y-STR test is performed for legal purposes, Our lab is required to perform an additional test to determine the underlying relationship. For example, if two males believe they are siblings but they decide to do a Y-STR test, Our lab is required to perform the Y-STR and a Siblingship test. This is an AABB accreditation requirement. The test to determine the underlying relationship requires additional costs. Please contact your account manager for questions about pricing.

Non-Chain-of-Custody Requirements

  • In a non-chain of custody test, samples are collected by the patients themselves. Results of this test are for personal knowledge only and may not be used for legal purposes

  • An in-home kit is used, and buccal samples can be collected by the patients themselves at a time and place of their choosing

  • Since the origin of the samples cannot be verified, names are listed on the report in the same way they are labeled on the samples

  • A unique barcode is assigned to each kit and will appear on the report as a reference for the case

  • Barcoded kits are assigned to your account for easy reference 

  • If a Y-STR test is performed for non-legal purposes, TADNA is not required to perform an additional test to determine the underlying relationship

Notes

  • The Y chromosome is passed from the biological father only to his male offspring. For example, a grandfather passes his Y chromosome to his son, who then passes it on to the grandson

  • Haplotypes are used to identify a paternal lineage. A haplotype is a combination of alleles on the Y chromosome

  • Y chromosome haplotypes are not unique. Common Y chromosome haplotypes can occur several times in a population

  • Y chromosome analysis can be used to provide inclusionary or exclusionary evidence of male lineage to support the results of relatedness testing (siblingship, reconstruction, and avuncular tests) 

For more information call 888.995.4DNA

Lab Experiment

Because only males have the Y chromosome, this analysis cannot be performed for females. Contact us for other testing options.

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Reasons to get a Male Lineage Y-Chromosome DNA Test. 

 

  • To confirm the truth about a biological relationship with a male relative or ancestor along your direct male line

  • To help confirm paternity between a male child and a possible father

  • Medical history

  • Results are completely confidential, and your private genetic information is never shared with or sold to outside parties.

Results are completely confidential, and your private genetic information is never shared with or sold to outside parties.

See our privacy policy here.

For more information call 888.995.4DNA

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