Appendix 8. 



International Rules for 

 Symbolizing Genes and Chromosome Aberrations: 



At the International Congress of Genetics held at Ithaca (N.Y.) 

 in 1932, it was resolved that the genetical societies of all countries 

 should cooperate to prepare recommendations regarding the problem 

 of standardizing genetical symbolism in order to discuss them at the 

 next International Genetical Congress. The International Committee 

 of Genetical Congresses appointed Professor Dr. Tine Tammes 

 (Groningen University) to take charge of the work to be done on 

 behalf of this resolution; in cooperation with Dr. H. de Haan, Miss 

 Tammes prepared a preliminary report on symbolism. Afterwards 

 Miss Tammes delegated the International Union of Biological Sciences 

 to continue her task; in cooperation with the International Institute of 

 Intellectual Cooperation at Paris, the Union convoked a meeting of 

 delegates from various countries, which meeting was held in London 

 in the hospitable home of the Linnean Society on August 14th and 

 ISth, 1939. This meeting, under the presidency of Prof. Dr. M. J. 

 SiRKs (Groningen) was attended by the following delegates; Dr. 

 A. Establier and Miss N. Nicolsky (from the I. LLC. at Paris), 

 Prof. Dr. O, Winge (Denmark), Dr. B. Ephrussi (France), Prof. 

 Dr. H. Nachtsheim (Germany), Prof. Dr. R. R. Gates, Prof. Dr. 

 J. B. S. Haldane and Dr. A. E. Watkins (Great Britain), Prof. 

 Dr. K. V, KoROSY (Hungary), Dr. K. Ramiah and Dr. S. N. 

 Venkatraman (India), Prof. Dr. M. J. Sirks and Dr. S. J. 

 Wellensiek (Netherlands), Prof. Dr. O. L. Mohr (Norway), Miss 

 Prof. Dr. M. Skalinska (Poland), Dr. O. Tedin (Sweden), Prof. 

 Dr. F. Baltzer, Prof. Dr. E. Hadorn and Prof. Dr. A. Ernst 

 (Switzerland), and Prof. Dr. E. W. Lindstrom (U.S.A.). The 

 delegates from Belgium, Italy, Finland and Japan were unable to 

 attend. 



The following rules for symbolizing genes and chromosome aber- 

 rations were drawn up : 



Choice of a standard type. — If it is desired to establish a 

 standard type, this should be the most common form, as a wild type, 

 or if such cannot be determined, the first studied most dominant form, 

 wild or cultivated. 



