. [Miscellaneous reprints on botany]. Botany. 9u ..<^' d f iiir^%0^ Fig. 2. g Fig. 2. Meiosis in £». coceinea (2n=32) a. mid-diakinesis. 6. late-diakinesis. c. pro-meta- phase (note association of bivalents). d. late pro- metaphase, orientation on spindle almost complete. e-f. polar views MI. (e=early metaphase). g. side view (complete) MI showing secondary association of bivalents. shown in the first column, those loosely associated in the second. The classifi- cation is necessarily arbi- trary with regard to de- ciding where association begins. Considering the results together we find tha
. [Miscellaneous reprints on botany]. Botany. 9u ..<^' d f iiir^%0^ Fig. 2. g Fig. 2. Meiosis in £». coceinea (2n=32) a. mid-diakinesis. 6. late-diakinesis. c. pro-meta- phase (note association of bivalents). d. late pro- metaphase, orientation on spindle almost complete. e-f. polar views MI. (e=early metaphase). g. side view (complete) MI showing secondary association of bivalents. shown in the first column, those loosely associated in the second. The classifi- cation is necessarily arbi- trary with regard to de- ciding where association begins. Considering the results together we find that association occurs be- tween 6 groups of 2 and 2 groups of 3 bivalents. Anaphase is normal but secondary association is maintained. Inter kine- sis is relatively short and at the 2nd metaphase some of the chromosomes are still associated. Tetrad formation is regular. D. coceinea. The diploid number of chromosomes in this spe- cies is 32. In 126 cases of diakinesis examined, no association other than bivalent was observed (Figs. 2 a, b). At meta- phase of the first divi- sion pairs of bivalents are seen lying in juxtaposition (Figs. 2 e, f). The degree of association is not so marked as in D. Merckii, and unlike this species some plates may be found in which there is little evidence of secondary as- sociation. A complete side view of first metaphase is. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original [London
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Keywords: ., bookcentury1900, bookcoll, bookpublisherlondon, booksubjectbotany
