Gene:
Or genetic factors, genetic genes, refers to the DNA sequence carrying genetic information, which is the basic genetic unit to control traits, that is, the functional DNA sequence. Genes express their genetic information by guiding the synthesis of protein, thus controlling the performance of biological individuals. Humans have about 20 thousand to 25 thousand genes. Chromosomes exist in pairs in somatic cells, and each chromosome carries a certain number of genes. In the process of cell mitosis, a gene has two opposite sites, called alleles, which come from the father and the mother respectively. According to the traits it controls, it can be divided into dominant genes and recessive genes.
Genetic testing:
Genetic testing is a technique to detect DNA through blood, other body fluids or cells. It is to take the oral mucosa cells or other tissue cells shed by the examinee, amplify their genetic information, and then detect the DNA molecular information in the examinee's cells through special equipment, predict the disease risk in vivo, and analyze the various genes contained in them.