1 Parental testing-to establish if someone is the biological parent of a child. 2  Forensic testing-to help identify suspects or victims in a criminal investigation. 3  Gene therapy-to test parents or foetuses for genetic conditions or birth defects. 4  Genetic genealogy-to find out more about someone's ancestry.NA tests are sometimes the only evidence to prove that a suspect was involved in a crime, or free someone who has been wrongly convicted. It is easy to tell if DNA from two biological samples does not match. But a match doesn't make you totally certain that the two samples come from the same person.
Light switches can be used hundreds of times a year in a home. This constant use can loosen wire connections and eventually wear out the moving parts. Wiring a switch is an easy do it yourself project. Just make sure to turn off the power to the circuit you are working on. A single-pole switch is used to control lights from only one location. The switch has two screw terminals on the body of the switch. Most switches will also have a green grounding screw. A single-pole switch will have ON and OFF marked on the lever. A switch is just a break in the hot wire controlling a light.
The Wet Switch is a solid state device designed to detect the presence of condensate water overflow. The Wet Switch is normally placed into the secondary drain pan- a normally dry pan. pan fails, condensate water will overflow into the secondary drain pan. woodwork, ceilings, and other property.