Monozygotic Twin Distinction
Definition
Despite sharing a genome, monozygotic twins develop different ridge configurations at the minutia level, demonstrating that ridge individuality arises from non-genetic developmental microenvironment variables rather than from the DNA sequence alone.
Related terms
- ACE-V
- Analysis, Comparison, Evaluation, Verification: the four-stage method for latent print examination used by accredited forensic fingerprint laboratories. Analysis examines the latent in...
- Eccrine Sweat Gland
- A coiled secretory gland in the deep dermis that opens via a straight duct to a pore on the friction ridge crest....
- Friction Ridge Skin
- Specialised volar skin on fingers, palms, and soles characterised by parallel ridges and furrows, absence of hair follicles, and a high density...
- Individuality
- The claim that no two persons share an identical friction ridge configuration at any corresponding digit. Supported empirically by the absence of...
- NAS 2009 Report
- The National Academy of Sciences report 'Strengthening Forensic Science in the United States: A Path Forward' (2009), which critiqued the scientific foundations...
- Papillary Dermis
- The uppermost layer of the dermis, characterised by dermal papillae projecting into the epidermis. In friction ridge skin, the pattern of these...
- Persistence
- The property that friction ridge configuration remains stable from birth through death and into decomposition, as long as the papillary dermis survives....
- Ridge Formation Window
- The period from approximately gestational weeks 10 to 17 during which friction ridges form by epidermal thickening and proliferation, propagating outward from...
- Volar Pad
- A transient cushion of mesenchymal tissue on the volar surface of each developing digit, present from approximately gestational week 6 to 7...
Explained in
- Friction Ridge Anatomy and In-Utero DevelopmentDespite sharing a genome, monozygotic twins develop different ridge configurations at the minutia level, demonstrating that ridge individuality arises from non...