主缢痕;
The chromosomes had some associations of the chromatids, but did not display primary constriction. Beet armyworm possess holokinetic chromosomes.
有丝分裂早中期每条染色体的的两条染色单体并排平行连接在一起,并出现有限的连接点,但没有观察到初级缢痕出现,甜菜夜蛾染色体为弥散着丝粒染色体;
Centromere& The primary constriction on the chromosome, a region at which the sister chromatids are held together and at which the kinetochore is formed.
染色体的主缢痕,使姐妹染色单体连在一起,在其两侧各有一个由蛋白构成的动粒。
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