- 01 Introduction
- 02 Biology of DNA
- 03 Practical Issues Specific to DNA Evidence
- 04 Introduction to the Forensic DNA Laboratory
- 05 Assuring Quality in DNA Testing
- 06 Understanding a Forensic DNA Lab Report
- 07 Statistics and Population Genetics
- 08 Mitochondrial DNA & Y-STR Analysis
- 09 Forensic DNA Databases
- 10 Collection of DNA Evidence from Suspects and Arrestees
- 11 Pretrial DNA Evidence Issues
- 12 Victim Issues
- 13 Trial Presentation
- 14 Postconviction DNA Cases
- 15 Emerging Trends
Principles of Forensic DNA
for Officers of the Court
for Officers of the Court
Module 4 :: Intro To the Lab
Topic 1 :: History and Development of Forensic DNA Analysis
DNA Typing — VNTRs
The regions of interests are called variable number of tandem repeats (VNTRs) and, with the exception of identical twins, people differ in the number of copies they have of a particular repeated DNA sequence. For example, a chromosome from one individual may contain 18 copies of a particular sequence whereas the same chromosome from a different individual may contain 25 copies of that same sequence.
