DNA has the ability to multiply, in some parts of the sled, at the same time, with an exact duplication that occurs before cell division itself. DNA old double spiral, disclosed by the enzyme helicase (selected weak links among the two bases) to form two separate new spiral of DNA. Every one of the oldest plays templetit (template), to be used as spiral coil instructors for the new synthesis of DNA. During the division of the nucleus (cell) occurs doubling of parental chromosomes. In this case the old molecule of DNA is divided into two coils, one of these with all domestic bases couple, moved and removed a few of the other coil. Then the two spirals separated by connections internal organic bases, start withdrawing (take) purine and pyrimidine bases in the district, as well as phosphoric acid pentoz from nuclear or cellular environment to form a second spiral in accordance with the structure of the databases that contain. So from a molecule of DNA (a chromosome) form two molecules of DNA homologous (2 homologous chromosomes) mother-daughter. Each of these two molecules contained by a spiral parental (old or original) and a new coil (here talking about doubling the original string of DNA), then any one of these rewrap to form a double helix as konñguracion consisting of 5 histone (protein) to form a chromosome.
New nuclide located inside the nucleus was attached bases exposed to any open spiral, eg C is attached to G and A with T.
