STUDIES ON THE STRUCTURE OF SALIVARY GLAND CHROMOSOMES:III. THE SPIRAL STRUCTURE OF THE SALIVARY CHROMOSOME IN CHIRONOMUS WITH SPECIAL REFERENCE TO THE DEVELOPMENT

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概要

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• 1. In the nucleus of the salivary gland cell of the Chironomus larva which has just hatched from the egg, four thick and short chromonemata are visible. In telophase of the preceeding mitosis of the salivary gland cell eight chromonemata are thought to conjugate into four pairs and become four chromonemata.2. The four chromonemata become gradually longer and larger, getting the matrixes around then. They are thought to be very unbalanced state and are easily broken, because the elongation and enlargement of the chromonemata and the matrix do not go parallel.3. In every one of these four chromosomes two conjugated chromonemata becomes gradually to be separated and are seen to run parallel in some cases, to twist each other or to fit inside each other in other cases. Sometimes the chromonemata are seen to be composed of tertiary chromonemata (Sinoto and Yuasa 1925).4. Then the chromonemata are broken into the banded structure. The chromonemata are often seen clearly when stained the salivary chromosome with aceto-carmine solution after the treatment with the aqueous solution solution of KCl, KNO3 KOH, NH4OH or NH4Cl and softening or destroying the matrix (Yuasa and Sinoto 1950).

• 日本遺伝学会の論文

著者

• YUASA AKIRA

  Biological Institute, College of General Education, University of Tokyo

関連論文

• STUDIES ON THE STRUCTURE OF SALIVARY GLAND CHROMOSOMES:III. THE SPIRAL STRUCTURE OF THE SALIVARY CHROMOSOME IN CHIRONOMUS WITH SPECIAL REFERENCE TO THE DEVELOPMENT

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