Why are human fingerprints different?

Fingerprints are genetically influenced. Because everyone's genes are different, so are their fingerprints. However, although the formation of fingerprints is mainly influenced by heredity, there are also environmental factors. When the fetus develops in the mother's body for three to four months, the fingerprint has been formed, but the child's fingerprint will change slightly in the process of growth, and it will not be finalized until puberty is about 14 years old. In the process of skin development, although the epidermis, dermis and matrix layer all grow together, the soft subcutaneous tissue grows faster than the relatively hard epidermis, so it will generate a continuous jacking pressure on the epidermis, forcing the slow-growing epidermis to contract and collapse towards the internal tissue, and gradually bend and wrinkle, so as to reduce the pressure exerted by the subcutaneous tissue. On the one hand, it is hard to attack, on the other hand, it is forced to withdraw, which leads to uneven skin and lines. This process of bending and wrinkling fluctuates with the change of the upward pressure generated by the internal tissue, forming uneven ridges or wrinkles until the development process stops, and finally it is shaped into a fingerprint that will remain unchanged until death. A primate fingerprint study in the United States suddenly saw fingerprints on a plaster model of bigfoot in the United States, with longitudinal fingerprints on the outside of the footprints. From the point of view of fingerprints, he made a fingerprint database of all primates in the world, including humans, and compared it with humans, orangutans, monkeys and baboons. The grain of this thing is different from that of humans and primates. It is the first time that a completely vertical fingerprint has been found in the world. A * * * has two mold fingerprints, which are the same. The two molds are 700 miles apart, and the age difference is 15 years. According to fingerprint experts, the possibility of fraud is very small. First, he must know the fingerprints. Second, he must span 15 years, and the two are 700 miles apart.