What does STR stand for in DNA analysis?

Master the CHHS CSI Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

In DNA analysis, STR stands for Short Tandem Repeats. These are sequences of DNA where a pattern of two or more nucleotides is repeated and the repetitions are directly adjacent to each other. STRs are crucial in forensic science because they are highly polymorphic, meaning that the number of repeat units can vary significantly among individuals. This variation allows for a high level of discrimination when comparing the DNA profiles of different individuals, making STR analysis a powerful tool in criminal investigations and paternity testing.

STRs are specifically chosen for analysis in DNA profiling because they are relatively abundant in the human genome and can be amplified using polymerase chain reaction (PCR) with relative ease. This allows forensic scientists to generate profiles from very small amounts of DNA. The clarity and precision with which STRs can be analyzed are essential for identifying potential suspects in criminal cases or confirming biological relationships in civil matters.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy