There are 27,000 genes in the human genome, of which less than 2% are effective. It is these 2% genes that control a person's sex, life expectancy, and health status... This mere 2% of genes manipulate Everything about us from birth to death. At the beginning, most people believed that the remaining 98% of genes were the remnants of biological evolution. They played little role in genetics, and could not encode any protein, just like sleeping Lying quietly in the human body, they are called silent genes. Even for a period of time, people gave them the name of garbage and called them junk genes. But some people think that these fragments that do not code for protein sequences may be Leftovers from aliens. But anyway, they are indeed one of the most mysterious parts of DNA.