Gene is the functional segment on the DNA molecule, the basic unit of genetic information, and the most basic factor that determines all biological species. . So where life is, where are the genes, and how all life exists and declines is determined by genes. This includes your face, height, weight, skin tone, temperament, and more. Genetic testing is a technology that detects DNA through blood, other body fluids, and cells. Genetic testing can confirm individuality, and it can also confirm the characteristics of the group (ancestral source) through group comparison, first narrowing the area in a haystack, and then testing individuality. Briefly describe the precautions for saliva genetic sampling performed so far. Precautions 1. Do not eat, drink, smoke or drink alcohol within 30 minutes before sampling. 2. Sampling the head of the swab, do not touch other items such as cheeks, fingers, teeth, etc. If you accidentally touch the swab, or the swab falls off during sampling, replace it with a new sampling swab and take the sample from the head. 3. Do not use when the package is found to be opened or damaged. Collection method The oral swab is composed of three parts: a sampling cotton tip, a cover stick and a push rod. Its purpose is to collect and preserve the descending cells of the oral mucosa. Physical examination centers, companies, and homes can all operate by themselves. First, rinse your mouth 2-3 times with water to clean your mouth. Then, take out the oral swab, gently press the cotton swab head of the swab on the inner wall of the oral cavity, with a slightly convex cheek, rub it up and down once, and scrape it 20 times. After wiping, insert the tip of the cotton swab into the sampling tube, press the swab stick with your fingers, drive the tip of the cotton swab into the trachea, tighten the tube cover, and shake it carefully.
Next, take another oral swab and repeat the action just now on the other side of the oral cavity. The collected sample DNA can be stored at room temperature.