[Intercellular transmission of information in the process of immunogenesis. V. Study of the role of low-molecular "immune" nuclear RNA in the synthesis of antibodies by rat transplantable lymphosarcoma cells].

The karyotype of the Ararat cochineal has been studied. The cochineal chromosomes are holokinetic, i.e. they have a diffuse centromeric activity; however, in some of them constrictions are detected. The constrictions are seen only in early stages of spiralization and are not detected in late metaphase. Sex determination in the cochineal takes place according to formula XX-X0. The female have two sex chromosomes being the longest pair in the set. The males are heterogametic having the X0-constitution. The meiosis is of a chiasmatic type. In the diakinesis bivalents are detected in the form of crosses or rings. Of different types of meiosis, the coccids possess a so called the Puto type, which s, according to preliminary evidences, very similar to the cochineal meiosis.