Why is str analysis preferred today?

The most common type of DNA profiling today for criminal cases and other types of forensic uses is called "STR" (short tandem repeat) analysis.

Explanation:

New technologies are regularly introduced and validated to expand the capabilities of laboratories working to recover DNA results with improved sensitivity and informativeness. Forensic laboratories have embraced automation for sample preparation and data interpretation in order to meet increasing throughput demands. Short tandem repeat (STR) typing continues to be the primary workhorse in forensic DNA analysis although other genetic markers are used for specific applications.

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