Why is a very small trace of blood enough for DNA fingerprinting?
A very small amount of DNA (eg. from blood) is enough for DNA fingerprinting because of the use of amplification techniques.
Polymerase Chain Reaction (PCR) is an amplification technique that is commonly used for this purpose. It can begin with a very small amount of DNA and make copies of this - resulting in enough DNA to run multiple tests.
Trace the pathway of unoxygenated blood from the upper and lower portion of the human body to the lungs and back to the different systems of the body?
Trace elements are any elements which are found in "trace" (very small) quantities in something. For example the major elements found in humans are Carbon, Oxygen and Hydrogen but small amounts of Magnesium and Iodine are also necessary for us to live healthy lives, these would be termed trace elements.
I am reluctant to give medical opinion on public forums, but the description of this condition is so concise, I will make an exception. You are in luck, the desired color of healthy human feces is brown. While other colors are acceptable and can even be entertaining, brown is the correct answer. Trace amount of occult blood is nothing to worry about. A particularly robust stool can cause a small rectal tear, leading to the…
In healthy people, a trace of blood in the urine on urinalysis can mean a bladder infection or other urinary tract infection is present or recently was, but when just a trace, it is not a serious concern and if it is from a test ordered by a medical professional, they will contact the patient if there is a concern over the results of the urine test. However, if the patient is taking the "blood…