1973 年 38 巻 4 号 p. 713-717
At pachytene all the seven bivalents could be followed in well spread cells. The chromosomes length varied from 24.76 micron for the shortest to 48.41 microns for the longest. Centromeres are not easily discernible, these are spotted out as small gaps flanked on either side by deep stained regions. The nucleolus organizing chromosome is the shortest and the nucleolus is conspicuous at pachytene. The nucleolus organizing region is almost terminal.