3o6 CHROMOSOMES IN HEREDITY: PHYSIOLOGICAL 



owing to the proximity of the organiser in X (Kaufmann, 1934, 

 cf. Ch. IX). 



Table 45 



Observations of Nucleolar Behaviour 



1. Attachment of Trabants to Nucleoli in Prophase of Mitosis. 



S. Nawaschin, 1912 (1927). Galtonia, etc. 

 M. Nawaschin, 1926. Crepis spp. 

 Senjaninowa, 1927. Ranunculus acer. 



2. Specific Organisation of Nucleoli next to Secondary Constrictions at Telophase. 



Heitz, 1931, 1932, many plants. 



Geitler, 1932. Crepis, ^x. 



McClintock, 1934. ^^^ Mays. 



Bearing, 1934. Ambly stoma. 



Matsuura, 1935 h. Polygonatum, Trillium. 



• 



3. Specific Attachment of Nucleoli at Prophase. 



(a) To the Sex Chromosomes : 



Buchner, 1909, Stenobothrus , oogenesis. 



Metz, 1926 ; Bauer, 1932 ; various Diptera. 



KUngstedt, 1933 ; various Neuroptera. 



Kawaguchi, 1933 ; various Lepidoptera, oogenesis and sper- 

 matogenesis. 



Heitz, 1933 ; Kaufmann, 1934 ; Dobzhansky, 1934. Drosophila. 



Tatuno, 1933 '> some Hepaticae. 

 [h] Not to the Sex Chromosomes (plants only). 



McClintock, 1931 ; D., 1934. ■^^«- 



F, H. Smith, 1933. Galtonia. 



^■> 1933. Agapanthus ; 1935, Fritillaria. 



Richardson, 1934, Spironema ; 1935, Crepis. 



Modilewski, 1934 • Upcott, 1936. Eremurus. 



Levan, 1935 a and b. Allium spp. 



Ono, 1935. Rumex acetosa. 



4. Survival at Metaphase of Mitosis and Meiosis. 



Modilewski, 1932. Fourcrcsa, root-tips. 



D., 1929 c. Tradescantia, pollen-grains. 



Klingstedt, 193 1. Trichoptera $, meiosis (chromatin-diminution ?). 



Gwynne-Vaughan and Williamson, 1933 et al. Many Ascomycetes, 



meiosis. 

 Webber, 1933. Nicotiana glutinosa, haploid, root-tips. 

 D., unpublished. Zea Mays. Root-tip, plant with 3 B chromosomes. 

 Geitler, 1935 a and b. Spirogyra spp., mitosis. 

 Frankel, unpublished. Fritillaria spp., meiosis. 



5. Relationship with Chromosome Movements. 



Manton, 1935. Cruci feres. 



D., 1935 a. Fritillaria (Plate XV). 



Upcott, 1936 b. Eremurus. 



