DNA testing can be a valuable tool for those who are looking to determine their familial relationship to another person. There are several different testing types available, so it’s important to understand the options and choose the one that’s most applicable to your situation and what you’re trying to determine. Sibling tests and Y-STR tests are two common types of DNA testing, so here’s more information about each one and the instances where they may be useful.

A Guide to Sibling and Y-STR DNA Testing 

What Is a Sibling Test?

A sibling test is for two or more individuals who may share one or more biological parents. The test can reveal whether participants are full siblings, half-siblings, or if they don’t share any biological parents. The test can be performed just on potential siblings, but it may be more accurate if the mother is known and can also submit DNA for testing. In addition to determining sibling relationships, it can sometimes be used to establish parent relationships if the parents are not available for testing, and their genetic relationship to one or more siblings is already established.

What Is a Y-STR Test?

A Y-STR test, sometimes called a Y-chromosome test, is often used to determine paternity when the alleged father is not available for testing. This test looks at the Y-chromosome of each individual, usually a grandfather and grandson or uncle and nephew. Since this chromosome is passed down from father to son for generations, it provides a method for establishing a direct paternal line. However, it is only available for male participants. It is also not as reliable as direct paternity testing, so it’s only recommended if the alleged father is unable or unwilling to participate.

If you’re looking for genetic testing options to establish family relationships, contact AccuDNA in Saint Louis, MO. The relationship testing center has been serving local families for 15 years, providing an array of testing options, including those for siblings, grandparents, parents, and other relatives. They offer flexible hours and convenient appointment scheduling to suit the needs of clients. To see a full list of DNA testing options, visit the website or call (314) 845-9997 to discuss your options.