GENERAL HISTOLOGY

EPITHELIUM

CILIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Chromosome movement in mitosis and meiosis is regulated by
A
microtubules
B
microfilaments
C
intermediate filaments
D
All of thiese
Explanation: 

Detailed explanation-1: -The spindle is a complex microtubule-based superstructure responsible for chromosome movement and segregation during mitosis and meiosis (McIntosh and Koonce 1989; Mitchison 1989a; Rieder 1991; Hyman and Karsenti 1996; Compton 2000).

Detailed explanation-2: -During metaphase of meiosis I and II, microtubules form a pointed and elongated bipolar spindle, which then shortens during anaphase. In addition, the microtubule density shifts from the spindle poles to the midzone between the separating chromosomes.

Detailed explanation-3: -Faithful chromosome segregation in mitosis and meiosis requires that chromosomes properly attach to spindle microtubules.

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