After the last emailed "newsletter" I received some questions and comments regarding what ySTR or S hort T andem R epeats of the Y chromosome is, and the difference between it and autosomal testing, and which test is beneficial to my research. Well to answer that question let's take a look at what each test is, who can take it and what will they tell us. Y Chromosomal or Y-DNA Testing A Y chromosome DNA test or more commonly known as Y-DNA test, is primarily a genealogical test that is used to determine a direct male (more specifically your father's) patrilineal or direct male line of ancestry. Certain identified ySTR markers that are tested by the DNA testing company are given a particular numerical value. Those values are compared to the values of another tester cousin to see if any mutations occurred over generations of time, causing a difference in value in any of those markers between the two testers' results. It cannot be used to test your mother's ...
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