Primary Transfer
Definition
The direct movement of biological material from an animal to a surface it contacts. When a dog sheds hair onto its owner's jacket, that is primary transfer. The material on the jacket can then move to a third surface by secondary transfer.
Related terms
- Canine STR Multiplex
- A validated set of STR loci used to generate a genotypic profile from dog DNA. The International Society for Animal Genetics (ISAG)...
- Exchange Principle
- Locard's core idea that physical contact between two surfaces moves material in both directions, so a perpetrator both deposits and removes trace...
- Medullary Index
- The ratio of the medulla diameter to the total hair shaft diameter. In companion animal hair identification, a medullary index above 0.5...
- Mitochondrial DNA (mtDNA)
- DNA located in mitochondria rather than the cell nucleus. Present in hundreds to thousands of copies per cell, making it recoverable from...
- Persistence
- The property that friction ridge configuration remains stable from birth through death and into decomposition, as long as the papillary dermis survives....
- Secondary Transfer
- The movement of a glass fragment from a primary surface (which contacted the broken glass) to a secondary surface (which contacted the...
- Short Tandem Repeat (STR) Profiling
- The amplification and typing of microsatellite loci where short DNA sequences are repeated a variable number of times. When applied to canine...
- TPR Framework
- Transfer, persistence, recovery: the three sequential filters that every trace passes through, and the lens analysts use to weigh what a positive...
- Trace Evidence
- Small quantities of material transferred between people, objects, and locations during contact. Forensic geology focuses on the geological subset of trace evidence:...
- Veterinary Forensic Pathology
- The application of post-mortem examination principles to animal deaths where criminal conduct is suspected. A veterinary forensic pathologist documents injuries, assesses cause...
Explained in these topics
- Companion Animal and Veterinary Forensic BiologyThe direct movement of biological material from an animal to a surface it contacts. When a dog sheds hair onto its owner's jacket, that is primary transfer. Th...
- Locard's Exchange Principle and Trace TransferMaterial passing directly from its original source to a person or object during the contact itself, with no intermediate carrier.