The U.S. Department of Justice has established a database that catalogs PCR amplification products from short tandem repeats of the Y chromosome (Y-STRs) in humans. The database contains polymorphisms of five U.S. ethnic groups (African-Americans, European Americans, Hispanics, Native Americans, and Asian-Americans) as well as the worldwide population. Y-STRs from the nonrecombining region of the Y chromosome (NRY) have special relevance for forensic purposes. Why?

Hello, everyone here. We have a question asking which of the following statements correctly describes the Y S. T. R. And the answer is B short, repetitive DNA sequences on the Y chromosome. And one way to remember this is Y. STR means short tandem repetitions on. Why? Thank you for watching. Bye!