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Genetically, individuals are 99.9% similar to one another and another .1% is what makes us distinctive and distinct from one another. Humans carry proteins necessary for survival and therefore are used for metabolization, fighting infections, and behaviour variables. Our cells have 46 strands of DNA which encompasses millions of particles called a nucleotides ( A,C,T, G). A gene is an important sequence of nucleotides that encodes proteins. The purchase price of the four nucleotides are essential for our own life survival. A small shift in one letter may cause critical damage to a person. As technology has evolved, scientists are now able to crack genetic code and also have been in a position to detect the complete set of individual genes. Genetic testing is a medical evaluation that reads out the hereditary material contained within the cell that can be used to identify any alterations of chromosomes, proteins or genes. RNA is also included for the research of certain conditions by using this technique. The purpose for this testing is for discovery of hereditary disorders in unborn infants and ascertaining if a patient is susceptible of being a provider of a condition or disease. It's also a handy tool for physcians, allowing them to better diagnose and treat patients. Another usage is for screening newborn babies for abnormalities that can make a condition or acute life threatening. Some people have utilized this technique to determine parenting and ancestral lineage. Cases of DNA or RNA are taken in blood, saliva, tissue, skin, or amniotic fluid depending on the type of evaluation being performed. Doing this evaluation can help identified any changes like a missing gene, or an additional receptor inside the DNA strand. In some cases, the gene is turned off, dropped completely has.