Where can I have a paternity test?

Ordinary hospitals can do paternity tests.

Paternity identification refers to the identification of the biological relationship between the defendant's parents and children by using the theory and technology of biology, genetics and related disciplines according to the genetic law of genetic traits between offspring and parents.

The cases involved include: disputes over the support of children born out of wedlock, disputes over property inheritance, identification of biological children caused by the wrong delivery room in the hospital, and claims for abducted and separated children.

Paternity identification is mainly based on the genetic law of simple genetic traits other than human blood type and blood type. Genetic traits are controlled by genes located on chromosomes in the nucleus, and individual characteristics are passed on to offspring through gene transmission between parents and offspring. Gene transmission follows certain rules.

Recognition principle

The theoretical basis for judging biological kinship is Mendel's inheritance of separation phenomenon. According to this rule, when gamete cells are formed, pairs of alleles are separated from each other and enter their respective gamete cells respectively. Sperm and egg cells are fertilized to form offspring, and the two genomes of the child come from mother and father; Therefore, one allele of the same pair comes from the mother and the other from the father.

If the identification results conform to this law, biological relationship is not excluded; If not, biological relationship (except variation) will be ruled out. In most cases, the mother-child relationship is known, and it is necessary to identify whether the hypothetical father and son are biological.

At this time, from the comparison of maternal and offspring genotypes, we can determine the gene (OG) that may come from the father among the children's genes. Then observe the genotype of the hypothetical father. If there is no gene of the biological father, the biological relationship between the hypothetical father and the child can be ruled out.

If it is assumed that the father also has the biological father gene, this result cannot be ruled out. If in a case, the mother is FGA-22/23 and the child is 22/25, then it can be determined that the biological father gene is FGA-25 by comparison.

In this case, assume that the father 1 is FGA-22/24; Suppose the type of parent 2 is 24/25. Assuming that the father 1 does not have the biological father gene 25, then the biological relationship between him and the child can be ruled out; In contrast, assuming that father 2 has FGA-25, it is not excluded that he is related to his children.