STR Marker
Quick answer
Short Tandem Repeat — a repeating DNA sequence used to identify individuals.
STRs are short DNA sequences (2–6 base pairs) repeated many times at specific locations. Every person inherits two values at each STR marker — one from each biological parent. Paternity testing reads 21–34 STR markers and confirms every one is consistent with paternity.
Browse the glossary
- AABB Accreditation
- STR Marker
- 34-Marker Paternity Test
- Combined Paternity Index (CPI)
- Probability of Paternity
- Chain of Custody
- Buccal Swab
- Cheek Swab
- Non-Invasive Prenatal Paternity (NIPP)
- Cell-Free Fetal DNA (cffDNA)
- Amniocentesis
- Chorionic Villus Sampling (CVS)
- USCIS Genetic Testing
- Form I-130
- Legal Paternity Test
- Home Paternity Test
- How It Works
- CLIA Certification
- ISO/IEC 17025
- College of American Pathologists (CAP)
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