[The importance of medical genetics study for the early diagnosis of mucoviscidosis].

The method of specific DNA amplification was used to study the polymorphism of the length of restriction fragment in the system CS-7 and KM-19 locus D7S23 in the family C. It is shown that cohesion of alleles A2 and B2 with mutation of mucoviscidosis and presence of a mucoviscidosis gene occurred in a healthy sibling. The family C, is prospective for prenatal diagnosis of mucoviscidosis by the method of specific DNA amplification in the system KM-19 restrictase Pst-1 and CS-7-Hinf-6-1.